>On Sat, 14 Jun 1997, Robert wrote:
>
>> Please excuse my ignorance, but what is "slow gum" ? Robert
>
>I've found that different gum arabics have different speeds, that is, one
>gum 14 printed with a given formula and exposure time would go to, say
>step 8, another with the same formula & exposure, to step 12; others
>inbetween.
I saw some interesting gums done by Peter Frederick (I think I've got the name right) in Bath. He was using whole eggs, whites and yolks. I think he said he was using in stand-alone form and also mixed with gum arabic. Since Gloy is said to be faster than gum arabic, it might be that other colloids are slower. I know you don't like Gloy but I am using it as an example of speed. In the past, Le Pages mucilage was used, though I don't know if that is available anymore.
Your idea of fast and slow gums is very very interesting and something I want to investigate from the commercial side when I get back to developing gum kits.
Dick Sullivan
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