On Sat, 13 Nov 2004 gdimase@hotmail.com wrote:
> pd Basically I don't believe there is any "tooth" for the sizing to adhere
> and the hardening is to harden the size so the gum bichromate and any other
> sensitive emulsion can hold an image.
Sizing is one thing, tooth is another. My original comment was that you
need *either* a substrate or a roughing up of the material to do gum on a
hard surface like metal. "The size" you refer to above is presumably
gelatin, since it has to be hardened, but something like polyurethane can
also be used. These are substrates.
Judy
>> You are saying that Jill Enfield prints gum bichromate on aluminum without
>> a gelatin (or other) substrate, or any "roughing up"?? Where did you read
>> that? (She doesn't cover gum printing in her book.) You may be talking
>> about her use of silver gelatin emulsion, which is of course in a gelatin
>> base.
>>
>> Judy
>>
>
Received on Sat Nov 13 23:37:13 2004
This archive was generated by hypermail 2.1.8 : 12/08/04-10:51:33 AM Z CST