It was a combination of the two. I undoubtedly got faster speed from the
ammonium dichromate but there apperaed to be a an added factor from the use
of the Gloy which also gave more consisitent results.
>As I recall Larry Shapiro also said he found gloy faster, but, again,
>faster than what?
That is a good question. Nobody has yet explained the purpose of this
discussion. What is the desired result from the slower gum.
>In any event, I've never seen it matter, since an exposure of 3 minutes is
>hardly a major advance on an exposure of 5 minutes. However in this case,
>for masking purposes, you're quite right, it does matter.
Slower gums can give marginally more subtle effects. This is an advantage
of gum
If we only seeking a gum as a mask I found it more effective only to coat
those areas of the print that one wishes to expose and not use a mask at
all. This is easy enough on a light box.
>I have not tried Le Pages glue, but I made a series of tests with
>rabbitskin glue.
The rabbit skin glue i know is a gelatine.
>Dick, it's not my *idea* -- it's my *finding.* If I solve the mystery
>I'll license it to you. ;- )
What is the mystery ?
Terry King