Digital BW, The Print

Jim,
    I think we may have what you are looking for. We have developed a film with a "green" coat on it that you can print on with our Black inkjet ink and then subject it to a UV Light source after which you can wash off the areas, with water, that were black printed leaving a UV resistant "green" negative of good quality. Not knowing where you are based I can't give you the nearest place to get some samples, but if you give me a call as below, I will give you some more details and I can arrange  some samples to test.

Regards

John
 
 John Edmunds
+31 593 543 206 Home/Office
+31 593 543 110 Fax
Skype: john_e
 



----- Original Message ----
From: geoman4919 <geoman4919@...>
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Sent: Sunday, 14 September, 2008 3:27:07
Subject: [Digital BW] gum arabic printing question


Hi, I am interested in gum arabic printing. This method of printing a
negative uses gum arabic and a watercolor pigment, with a sensitizer-
potassium dichromate. The dichromate renders the gum arabic insoluble
in water on exposure to light. The print is developed in warm water.
The unexposed portions of the print dissolve. I want to find another
chemical rather than the dichromate to use. This chemical is too toxic
for home use and a substitute is needed. Does anyone know of another
chemical which will release oxygen on exposure to light like the
dichromate? Alternatively, a chemical that would produce acidic
conditions on exposure to light would also render the gum arabic
insoluble.

Best Regards

Jim

 

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