hi Scott thanks you for the Videos.i made the step wedge for digital negative based on your video. What is the next step? thank you
@uriahb.74 жыл бұрын
am i able to achieve this method through a photolithography method using the vaccuum exposure machine? or do i use the screen printing exposure machine?
@scottbarnes59634 жыл бұрын
Anything that can hold a film tightly to the plate and that radiates UV light at 365nm will work. A vacuum table is actually better than the unit I am using.
@uriahb.74 жыл бұрын
@@scottbarnes5963 thank you! i will come back when i am able to get into the studio.
@98Kentuckian4 жыл бұрын
Nice tutorial. Very simple, I'll be doing this soon for my cyanotypes
@salgado9624 жыл бұрын
Dear Scott, can I buy your book "Making Photogravures with Polymer Plates" in PDF format?
@divusiulius75394 жыл бұрын
Does it help to know the Bit Number of each gray tone? And does this change between 8 Bit Gray Value, 1.8 and 2.2? 255 = 0%, 230 = 10%, 204 = 20%, 179=30%, 153=40%, 128-50%, 102=60%, 77=70%, 51=80%, 26=90%, 0= 100%
@scottbarnes59634 жыл бұрын
I do not know if the correlations are static or relative to the gamma differences so cannot answer your question.
@EricBuechel5 жыл бұрын
Well done explaining the process.
@divusiulius75395 жыл бұрын
Is there a Step wedge for Exposure Calculation for contact printing?
@girliedog5 жыл бұрын
nice, clear, easy , thank you
@divusiulius75395 жыл бұрын
I'm very new to creating digital negatives and have no idea what i'm doing. Just how accurate or useful is this particular step wedge for creating Digital Negatives? How well does this step wedge perform compared to a manufactured Step wedge by Stoufer? Is it really this easy? Since I'm bumping around in the "Shadow Details" on this subject, I just needed some clarity on the subject of step wedges. There is very little information out there about creating step wedges.
@scottbarnes59635 жыл бұрын
Stoufer makes step wedges with specific, predictable densities every time. If you have manufactured film negative, paper, or anything traditionally photographic, use the Stoufer. The process in this video is for those who are using their own printers to create digital negatives/positive on transparency film. By printing a step wedge on to the transparency film, you can use it to determine what densities are being printed by your printer/film combination. It's the first step towards making an adjustment curve with your equipment. 1. Make the step wedge as per the video. 2. Use the step wedge as your negative/positive in your photographic printing process. 3. Look at the resulting print and compare the differences between what densities you should be getting vs what you are getting in reality. 4. Scan your print and open in Photoshop. 5. Compare your scanned print to the digital version of your step wedge. The digital version is your target (where you want everything to be) and the scanned version is what you are really getting. The difference between the two is how you will build your compensation curve. (see other video)
@divusiulius75395 жыл бұрын
@@scottbarnes5963 Thank you So Much Scott. This was truly helpful and informative. I'm comparing what I'm reading in some of my older books on Digital Negatives and Pt/Pd processes and printing. Can you recommend any current material that is as useful and practical as this video is? What did you read or find really useful on this subject?
@scottbarnes59635 жыл бұрын
@@divusiulius7539 I just made many experiments before figuring out a workflow that I liked. I wrote up my workflow in my book, but that is really just expanded notes to myself and has some errors that I would correct now. Honestly, the information is so spread out across the web that it's bit difficult to get one good one together (and some people are holding on to their own secrets about the process). If you are ready to make a bunch of experiments, that is the best thing to do. Otherwise, seek out a workshop where someone can walk you through it. I wish I could be more helpful. Good luck.
@divusiulius75395 жыл бұрын
@@scottbarnes5963 Thank You! And you are right; experimentation is the best teacher. I should have expected that some are holding on to their secrets. That's ok too! In this weird economy anything that gives anyone an edge is an opportunity to earn good money. And I don't fault people for holding on to their well earned secrets from the time and hard work! This is the fruits of their honest labor. That's what hard work is for. Advancement. And I do want to thank you for your insights and the information you shared. Cheers! Divus Iulius
@Igaluit6 жыл бұрын
What about step wedges for determinng your true film speed?
@scottbarnes59635 жыл бұрын
For that, you would need to purchase one of the manufactured step wedges in which the density of the film and steps is controlled and predictable.
@kokos546326 жыл бұрын
hello Scott, i have your book and i was trying to do the experiment with for the basic exposure time. i am failing to achieve the same results. as the higher the time of exposure of the screen the plate holds less ink, for example, after 5 minutes of screen exposure, the plates is completely hardened thus it holds no ink. i don't understand how you get darker results when u exposure the screen for more time. from my understanding, if more light goes through the tiny gaps of the stochastic screen the polymer plates gets more hardened, thus less ink. please help!!!
@scottbarnes59635 жыл бұрын
It is a range. Too little exposure and nothing is hardened (therefore it all washes out and will not hold ink). Too much exposure and everything is hardened (therefore no texture to hold ink). Buy a stoufer step wedge (most easily found these days on screen printing supply shops). The KM-73 plates tech data sheet tells you which number on the Stoufer wedge you should see hard and which ones should wash away. Cut your plate into strips. Use the step wedge to expose the strips. Do one for 1 minute, another for 2 minutes, another for 3, etc. That will get you close. When you are close, then move on to the process in this video to fine tune.
@VolhaFurs7 жыл бұрын
Thank you very much for the video! Your description of the process and your comments are the most detailed and helpful I found so far!
@krishnansrinivasan8307 жыл бұрын
Sir , Nice video. I'm from India.I found out the price of other necessary stuff for making a photogravure. I would like to know , what would be the cost of the press to print 13" x 19" photogravures. Thank you :)
@scottbarnes59637 жыл бұрын
Thank you. The price for presses ranges depending on quality. A quality press big enough to print that size in the U.S. can range from $2,000 to $10,000. Etching presses can easily increase in price, depending on the precision of the machinery and the extras that make printing easier. Do a search for an "etching press" or "intaglio press" to see what you find. I have access at a school, and many people here can gain access through a printmaking society or association. That might be an avenue for you to explore. Owning your own press can be expensive.
@doctorrobin30407 жыл бұрын
Great help, thanks.
@justinsvideo7 жыл бұрын
Very helpful, thank you! Just FYI you can now 'clip' adjustment layers to specific layers, so they do not impact any layer except the one you want. Pretty sure this was true as of a few Photoshop versions ago.
@scottbarnes59637 жыл бұрын
Yes, you can. For many people, just getting the idea of the default layers set up takes a while, so I chose to ignore the more sophisticated settings while making this tutorial for my class.
@justinsvideo7 жыл бұрын
Super helpful, thanks!
@nicolasdufour-laperriere9248 жыл бұрын
Thanks Scott for the video! Just two little questions. Why do you expose the blank plate for 5 minutes at first? And secondly, do you use a brand of transparency film in particular (I know it is not standard presentation transparency that must be used normally...) Thanks again!
@scottbarnes59637 жыл бұрын
The first exposure uses a transparency with a random dot pattern (stochastic) to create an initial matrix that will hold ink. The second one is the image. I tend to use inkjet transparency film from the screen printing industry, and my favorite is Fixxons. fixxons.com/1Silk/main.html
@Tedzee88 жыл бұрын
wait wait wait... how did you do to get an image on the metal at FIRST? :) I ve heard it's possible to obtain a perfect image like a photography on a metal sheet but... how? :) Thanks for you answer in advence
@scottbarnes59638 жыл бұрын
+Thibaud The process shown above uses a steel-backed polymer plate, and not steel or copper. The printing process is the same once the matrix is made. The difference is that metal plates require carbon printing and an etching process with acid to create the matrix, while polymer requires a transparency (film or inkjet) and a water etching process. Both must be exposed to UV light. There are many books and helpful resources online that can answer some of your questions. I suggest starting with www.alternativephotography.com The best way to learn this is through a workshop. Online resources and books can only provide a limited amount of information.
@joehoynik8 жыл бұрын
Great video. Thanks Scott. After watching another video of Chuck Close's photogravures, which was a total garbage, yours is just the opposite, very precise and to the point. Thanks!
@scottbarnes59635 жыл бұрын
Thank you. I am flattered. Chuck Close is an incredible artist. The process he is using is more traditional and creates stunning images.
@scottbarnes596310 жыл бұрын
link to video that shows how to make a plate kzbin.info/www/bejne/mn68mmp9abOCsKM
@scottbarnes596310 жыл бұрын
Link to video that shows printing a plate. kzbin.info/www/bejne/ZnnOp6ukhJdlqZY
@scottbarnes596310 жыл бұрын
I wrote a how-to book for the process I used in my studio. www.amazon.com/Making-Photogravures-With-Polymer-Plates/dp/0615919219
@scottbarnes596310 жыл бұрын
www.amazon.com/Making-Photogravures-With-Polymer-Plates/dp/0615919219 Made a book that reveals the entire workflow, from printing the inkjet transparency, exposing and water-etching the plate, to printing (like in this video)
@scottbarnes596311 жыл бұрын
Some minor corrections: The plate oil used is #2 (not #00), and the ink was made the previous day, but stored in a can to minimize air exposure. (It can't be left out over night.)