Frequently Asked Questions
Updated Feb, 2004

I hope these questions and answers help as you learn and experiment with the expanding world of digital negatives. Some of the answers may seem overly technical. Remember that your main source of information is still my 350–page book, Making Digital Negatives for Contact Printing, where all the principles of digital negatives are thoroughly explained.

The Inkjet Negative Companion is a supplement to Making Digital Negatives for Contact Printing. It includes a Photoshop template image,and 55-page PDF that fully explains the newest desktop neg options. I also include a Color Settings File that you load in Photoshop to prevent undesirable contrast changes.

Check the Book Info page for the latest curves and printer information: www.danburkholder.com/Pages/misc_pages/inkjetneg.htm.

General Digital Negative Questions

Inkjet Negative/Printer Questions

Imagesetter Negative Issues

Photoshop Questions

Computer Hardware Questions

Scanner Questions

Icefields Software

Piezography/Quadtone Questions

Where to Shop for Computer Hardware and Software

Why do My Emails Go Unanswered?

General Digital Negative Questions

Do you use digital negatives for your own printing?

Yes. In fact, the last time I made a traditionally enlarged negative via wet processing was in early 1992.

If I get your book, will I be able to make digital negatives?

Yes. I’ve provided step-by-step instructions for both desktop and imagesetter negatives.

Is your Second Edition of Making Digital Negatives for Contact Printing the most current version?

Yes. The core information in the Second Edition remains as vital as ever. I provide updates (new curves and printer information) via my web site.

For the newest information on using the Epson 2200 (and 1280), you should check out my Inkjet Negative Companion. This supplement to Making Digital Negatives for Contact Printing contains lots of new time-saving tips.

Inkjet Negative/Printer Questions

Which Printers Work for Digital Negatives?

The short answer can only be they all do. After that, the difference is one of quality. The chart below will show you for which Epson printers I’ve supplied curves on the book CDROM or on my web site.

Though I said this already, for the newest information on using the Epson 2200 (and 1280), you should check out my Inkjet Negative Companion.

Printer

Curves for Silver? Curves for Platinum?

Epson Photo EX

Yes, on book CDROM

Yes, on book CDROM

Epson 1200

Nope, never used this model

Nope, never used this model

Epson 1270

Yes, on my web site

(the 1270 makes great negatives with Pictorico OHP Film)

Yes, on my web site

(the 1270 makes great negatives with Pictorico OHP Film)

Epson 1280

Yes, curve is on my web site (This curve uses all six colors and produces a slightly grainy negative.)

Yes, on my web site. (This Curve uses a Colorized Scheme using 0/55/55/0 as the CMYK values.)

Epson 2000

No

Yes, on my web site you’ll find a prototype curve.

Epson 1160

Nope, though I’m sure it will work.

Yes, on my web site you’ll find a curve that is used with Jon Cone’s Quadtone Inks and Piezography software to make very good negs for platinum printing.

Epson 2200/7600/9600

Yes, and these printers give the best negs on desktop yet! Curves and Printer Settings for both Platinum and Silver Gelatin are Here!

Are Inkjet Negatives as Good as Imagesetter Negatives?

Imagesetter negatives still have a quality advantage for those printing on a gelatin over-coated paper like commercial silver gelatin papers. For those printing on hand-coated papers for alternative processes, you’ll be hard-pressed to notice any difference in the final print between images made from good inkjet negatives and those from imagesetters. The only exception might be for images with large expanses of smooth tones like gray skies and such.

Which Transparency Film is Best for Desktop Negatives?

So far, I haven’t found a better substrate for making inkjet negatives than the transparency film made by Pictorico. The Pictorico OHP film has a superior gelatin/ceramic coating and is available in sheets and rolls from both Pictorico and Mountain Studios.

Do You Still Use the Colorize or Color Table Methods (Chapter 12)?

When I wrote Making Digital Negatives for Contact Printing, the Epson Photo EX was state of the art. With that printer and Epson’s own Transparency Film, making a colorized negative produced the best results for platinum printing. When I teach workshops in Mexico, where they still use the Photo EX printers and can only get Epson’s transparency film, I still make negatives just as outlined in the book.

Printers after the Photo EX—along with better transparency materials like the Pictorico OHP—allow us to apply heavier neutral-color ink loads on the film.

With the 1270 and Pictorico OHP Film, I get smoother results when using all six inks and not colorizing the negative at all.

For the Epson1280, I have returned to the Colorize method to create an orange negative for platinum printing. More Epson 1280 info can be found below.

These "when to colorize" issues are covered in depth in The Inkjet Negative Companion.

Do You Have New Epson 1280 Information?

Yes, there is information on the book info page of my site.

You can also learn all kinds of valuable techniques for the 1280 in my new The Inkjet Negative Companion.

Are There New Techniques for the Epson 1270?

On the Epson 1270, should I use all six inks to make a neutral color negative or should I colorize to make an orange negative?

In the tests that I ran with the 1270, the six-color, neutral negs actually printed better than the colorized negs. More testing is needed but that newest curve on my web site is designed for using all color inks.

For the newest Epson 1270 Curves on my site, you should apply the curve after doing all your grayscale adjustments. Then invert and print. The image can be in either Grayscale or RGB mode though it should not have any actual color remaining. It's also best to strip out any profile (Image>Mode>Assign Profile>Don't Color Manage This Document) to help prevent the Epson RIP from changing any values in your image.

Print your Grayscale image using all six colors on the 1270 (in other words, do not colorize your image in Photoshop).

(Note that with the Epson 1280 printer, I’ve gone back to using the orange, spectral density negatives.)

What about the Epson 2000P?

I now have the 2000P. Any experience with these inks and the Dan Burkholder method of digital negs for contact printing?

My site now contains a prototype curve that worked well on the 2000P for making platinum negs using ALL SIX inks (printing in color) on Pictorico OHP film. There is also a jpeg showing the print dialog box. This curve can serve as a starting point for those using the 2000P but you’ll most likely have to make some adjustments in the curve shape.

The 2200 Epson is now my printer of choice for making desktop negatives.

How are Hewlett Packard and Other Printers for Making Negatives?

There are lots of very good photo quality printers on the market. Unfortunately, I don’t have time to test them all. Epson printers are the ones I use for both print and negative making.

What about Quadtone Inks and Piezography Software?

I heard that you had switched to PiezographyB/W inks on an 1160 for printing platinum-useful contact negs. Is this correct, and if so, would you recommend PiezographyBW above MIS quads or above the 1270 (in color) for printing platinum negs? I have both an 1160 and a 1270 and am not sure which I should test more fervently.

Yes, in the past I used an 1160 and Cone Quad inks and Piezography software for my desktop negatives for platinum printing. With Piezography Quadtone inks and Pictorico OHP Film, I made very good negatives. One downside to this method is that the inks don't stick to the OHP, requiring an additional step of applying a spray fixative. If you don't do this, the image will literally rub-off. Krylon #1313 is a good choice of sprays.

As an aside, black and white prints from Jon Cone’s Quad inks and Piezography software are stunning.

What about MIS Inks?

Though I haven't used the MIS inks, they should work for making negatives. You'll most likely have to adjust the curves in Photoshop a bit. http://www.inksupply.com/

What about Lincoln Inks

John Nollendorfs is formulating special quad inks that will have the additional density we need for negatives. You can learn more about all his inkjet printing products at http://www.lincolninks.com/.

Do You Have a Silver Curve for Piezography?

I don't have any curves for silver gelatin using Piezography and the 1160 printer (or any other printer for that matter) so I'm afraid you'll have to run your own tests. If you come up with good silver curves, pass them on to me and I’ll post them, eagerly giving you credit for your investigative work.

What about the Epson 3000?

I bought Cone’s outfit for the Epson 3000, and plan to try it soon but am interested in making gelatin silver as per your work. Will it work?

The 3000 can make beautiful prints with Piezography but I don’t think it's a good platform for negatives. Since the 3000 seems to witness unit-to-unit variations, there’s a chance some of them will work better than others. The fact of the matter is that the 3000 is getting long in the tooth when it comes to mechanical features and ink droplet size.

Why Don’t Jon Cone’s Quadtone Inks Absorb into Pictorico OHP Film?

I went the route of getting an Epson 1160 with the Piezography system from Jon Cone, hoping for great quality Pictorico OHP negs. Unfortunately, the ink doesn't adhere to this base well. How do you protect the negative on this material? Some have used lacquer spray, others have used thin Mylar sheets. What have you used with success on this?

Both. The .002" Mylar (available at art supply stores) works well but can abrade the pigment image if the negative/Mylar sandwich isn't handled carefully. I know because I've transported some such negs around the country and have seen them damaged from the handling. For in-studio use, where we store and handle negatives much more gently, it shouldn't be a problem to attach the Mylar to the negative with tape.

I now spray my Cone quadtone negatives. My best results—most even spray, fastest drying time and lowest stink factor—have been with the Clear Acrylic Matte Coating from Crafts, Etc. I found this spray at our local Hobby Lobby. The McDonalds’s Sureguard Lustre spray works well also. The matte might be even better but I haven't tried it yet. A Krylon clear matte acrylic (#1312) works well.

Some users report good results with a gloss spray. I favor the matte because the micro-texture provides canals through which air can escape when the negative is against another smooth surface (like the .002" Mylar) in the vacuum frame.

Why Don’t Transfer Functions Work with Piezography Software?

Some users have noted that Transfer Functions do not work with the Piezography driver. Since Transfer Functions and Curves are essentially the same thing (Transfer Function does provides a higher degree of precision when designing the Curve), you can create your Transfer Function and then apply it to your grayscale image as a Curve or Curve Adjustment Layer. I do this all the time.

One word of warning: A Mac is smart enough to regard Curves and Transfer Functions as the same thing, meaning you can open both from either the Curves or Transfer Function Dialog Box. On a PC, things get a bit more difficult (what's new) in that the correct file extension must be on the Curve or Transfer Function in order for the corresponding dialog box to recognize it.

I've had very good luck with the Piezography software and inks but I certainly understand that the 1160 is a quirky beast and others might want to try different solutions. I should also add that Bill Bergh in Tech Support at inkjetmall.com has been very responsive whenever I've called with questions or problems.

Why Do I Get a Pattern in my Negative with Piezography?

Make sure you use the latest version of the Piezography driver to help minimize a pattern in your negatives.

Imagesetter Negative Issues

Where Should I Get My Negatives Made?

The best service bureau is one close by so you can establish a relationship and more easily troubleshoot any problems that might pop up. That being said, it’s often easier (and cheaper if you live in a large metropolitan area where all such services are overpriced) to send your files to a remote service bureau that understands the digital negative process and will give you great service at reasonable prices.

One such service bureau is Copy Graphics in Santa Fe, New Mexico.

Their contact info is as follows:

Copy Graphics
314 Read Street
Santa Fe, NM 87501
Wk: (505) 988-1438

www.copygsf.com

Though anyone at Copy Graphics can help you, Peter Ellzey knows the digital negatives intimately and is always eager to help.

What about Imagesetter Resolutions?

Though they look great in platinum, when I print silver gelatin from 2400 dpi imagesetter negatives, I can see the dots in highlights. Would going to higher imagesetter resolutions help create more smoothness in my negatives and silver prints?

Yes. If you can find an imagesetter that reliably images at 3600 dpi resolution, then you should prepare an 1800 ppi diffusion dither bitmap (from a 900 ppi grayscale image) in Photoshop. Similarly, if you want to try an imagesetter that runs at 4800 dpi, you should prepare 2400 ppi bitmaps, that in turn come from 1200 ppi grayscale files.

Should I try to get imagesetter output at 4800 dpi or higher?

Sure. If you can find a service bureau that reliably produces resolutions like that there’s no reason you shouldn’t. Silver printers in particular will find that the highlights are smoother if the Diffusion Dither Bitmaps they create in Photoshop are 1800 ppi or higher. Platinum printers are usually perfectly happy with the 1200 ppi Bitmaps that run on imagesetters with a resolution of 2400 dpi.

Another option is to use a conventional linescreen instead of the diffusion dither bitmap. Brooks Jensen makes wonderful negs for silver gelatin printing using a 450 lpi (lines per inch) traditional screen that is imaged with an Agfa imagesetter that runs at 3600 dpi.

Which Imagesetter Curve Should I Use for Silver Printing?

Should I be using the Lenswork curve or the Folberg curve?

I recently made imagesetter negs at a workshop in Santa Fe and the Folberg curve worked very nicely. Brooks Jensen has his curve worked out perfectly for his system but some users find it a bit flat in the highlights. I suspect it has to do with the fact that Brooks is PC-based (in other respects, he’s a fast learner) and with the darker PC monitor gamma of 2.2, he’s tweaking his images accordingly. In any case, the Folberg curve has worked better in the Macintosh workshops…which are nearly all the workshops I’ve taught.

What Happened to Icefields Software?

Many have written about the disappearance of Isis Corporation and their wonderful Icefields stochastic screening software. One of Icefields’ advantages was its ability to bypass Photoshop’s 30,000 pixel limit (in either width or height) that can become an issue when converting grayscale images to bitmaps at 1,200 or more pixels/inch. Isis hopes to rise like the Phoenix in the future so they don’t want older versions of their software distributed for free.

In the mean time, you might investigate Rastus Software as a stochastic screening alternative:

What is Rastus Software?

I recently learned of an alternative stochastic plug-in for Photoshop. I haven’t tested this yet so I can’t tell you if it makes better imagesetter negatives than Photoshop’s Diffusion Dither method (in other words, don’t email or call me with questions about this software). The software author seems very committed to photographers and says the midtones and highlights should be smoother than those from Diffusion Dither Bitmap negatives. Go http://www.telegraphics.com.au/sw to download a demo version.

Why do my emails go unaswered? What kind of a jerk are you anyway?

I'm truly sorry if yours is among the neglected emails sitting way down in my in-box. It has become impossible for me to answer more than a percentage of the emails I receive. I have to ignore both the questions and the nice notes of praise; I am an equal opportunity ignorer. Until I can afford an assistant to dig through the clutter (and trust me, I use the best spam filters already), I simply cannot reply to many people, as much as I might want to.

Photoshop Questions

Why Can’t I Open the Curves on Your CDROM?

When I double-click the curves on your book’s CDROM, it only opens Photoshop. What’s wrong?

Remember, you don’t open curves; you load them by clicking the Load button in the curves dialog box.

(Of course, you must have the Making Digital Negatives for Contact Printing CDROM in your drive or have copied the curves to your hard drive in order to access them.)

Why Can’t I Use Channel Mixer with My image?

Are you in a Color Mode? Channel Mixer won’t work on grayscale images.

Are you on an Adjustment Layer by mistake? You must be on an actual pixel layer for Channel Mixer to work.

Bitmaps Look Terrible on my Computer, How Come?

With Photoshop 6, Adobe has again changed the way bitmaps portray on screen. At certain resolutions, bitmaps look absolutely horrible; at others they look swell. Try zooming in and out to discover the magnifications at which your bitmaps look smooth.

Is There Any Way around Photoshop’s 30,000 pixel limit?

Photoshop7 and earlier had a peculiar limitation on image size of 30,000 pixels in either height or width. This only becomes a problem if you are preparing diffusion dither bitmaps for imagesetter output. With bitmap resolutions of 1200 ppi, you run out of pixels at 25 inches! Photoshop CS eliminated this limitation.

Why Didn’t Something Work Right in Photoshop?

No matter how experienced or smart you might be, there will be times when things just don’t work the way you hoped or expected in Photoshop. If you approach the problem logically, you can usually find out why things aren’t going the way you want.

Try to make your personal trouble shooting checklist.

If a Photoshop Tool or Command doesn’t behave or perform as expected, go through your list. It might look something like this:

How Should I Set the Color Settings in Photoshop?

Adobe has greatly simplified the Color Management settings. Of course, it’s still a confusing landscape with many experts disagreeing on how it should be used.

The important thing to remember in the Color Settings dialog box (Edit>Color Settings) is to check all the Ask When boxes in the Management Policies section. This way Photoshop will have the courtesy of consulting you before arbitrarily changing your images when opening or pasting from one color space to another.

My Inkjet Negative Companion includes a Color Settings File that you load to prevent unwanted density changes in your step tablets and images.

How Should I Calibrate My Monitor?

I’m often asked about monitor calibration, particularly as it applies to Photoshop 6 and later. You could simply use the included Adobe Gamma utility. It’s…well, better than nothing. Here’s my approach. If you want your digital images to print the way you expect and display and print for others they way you want, you have to deal with color management. And because a properly calibrated monitor is the foundation of any color management scheme, you should start with a solid foundation.

The best thing happening for monitor calibration comes from Color Vision (www.colorcal.com). They’ve aggressively priced their hardware and software to make fast and easy monitor calibration available to us all. I use the Monitor Spyder with Optical software and I now have confidence in my monitor calibration.

Olé No Moiré Calibration Image Questions

With the included Olé No Moire image, when I measure the % K for the gray scale I get a 5-10% difference. How do I correct this?

When you open the calibration image, be sure to choose "Discard the Embedded Profile (don't color manage)" when the Embedded Profile Mismatch dialog box comes up. That box appears IF you have the "ask when opening" option checked (which you should) in Color Settings with Photoshop.

Computer Hardware Questions

Where Should I Buy RAM?

Check the following:

Should I Buy a Mac or a PC?

I’m a dedicated Macintosh user so you certainly won’t get an unbiased opinion from me!

There isn’t a giant difference between the Mac and Windows operating systems. Macs shine because Apple controls the hardware and operating systems. This means there are fewer incompatibilities and hassles. In Mac-based workshops, I’ve heard PC users say things like, "I didn’t know computers could be so easy." You’ll never hear a Mac user say that after working on a PC for the first time.

But I already own a PC and don’t want to lose my software investment. What should I do?

Some PC users add a Mac for their imaging needs, keeping the PC as a business computer. The two platforms can easily coexist on a network.

Adobe will let you "switch platforms" when upgrading Photoshop. They charge a low fee (something like $50) to switch your version from PC to Mac. Contact Adobe for more information.

And of course, you can always use Virtual PC emulation software on a Mac to run all your PC software. The latest version runs Windows programs on a G4 Mac as fast as a 1GHz Pentium.

Dual Processor Macs and Speed Comparisons

I will soon be buying a new Mac. Would you go for the dual processor model?

I use a dual processor G5 Mac and am very happy with it. With OSX, the operating system will recognize multiple processors for all tasks. This will mean an immediate speed increase for dual processor users.

Which Scanner Should I Buy?

I get this question regularly. It’s much like being asked, "Which car should I buy?" There are just too many variables and personal preferences to make it an easy question to answer. If you are contemplating a scanner purchase, join the scanner list on the Internet and ask your questions. Log on to www.leben.com/lists for information on how to subscribe to the scanner list. At this same site you’ll find information on joining the Epson Inkjet Printer list and the Digital Camera list.

Where Do You Like to Shop for Computer Hardware and Software?

Of course you should always do your price research before purchasing. A couple good price-search engines are at My Simon and cnet.