Talk:Gum printing

 Velella  Velella Talk 14:10, 4 May 2023 (UTC)

Gum bichromate
How about merging this article with Gum bichromate plus a redirect from "gumprint"? --Einemnet 07:43, 5 November 2007 (UTC)

Two main issues. Firstly the Gum bichronate process and Gum printing are different in that in the first, coloured material is included in the gelatine bichromate mix so that after exposure and "development" a single coloured print is obtained. In gum printing however the process makes a negative in relief which is then used to make multiple copies using a printing method similar to lithography - unfortunately the text of the Gum printing article confuses the two processes making them sound as if they are the same. I will try and edit a little more clarity into the article. Velela 22:57, 5 November 2007 (UTC)

A further issue is that much of the text of the Gum bichromate article really belongs in Wikibooks and not here - all the recipe and methods stuff for example. Velela 23:03, 5 November 2007 (UTC)

Ammonium Dichromate saturates in distilled water at around 25-29%, not the 15% quoted here. I then mixed the sensitizer 1:3 with gum acacia. My contrasts turned out fine, though I am still working out some issues with yellow staining. What I'm trying to say is that some citations here would be appreciated. **Gum Bichromate processTerryToogood (talk) 19:48, 4 May 2015 (UTC)


 * The yellow staining may be residual chromic acid - see article - which can  occur at high concentrations of dichromate.  Velella  Velella Talk  19:52, 4 May 2015 (UTC)


 * Merge Supported - albeit a little belatedly. The two article cover the same topic and the common term in much of the 19th century technical literature is Gum printing.  Velella  Velella Talk 14:13, 4 May 2023 (UTC)
 * It looks like this discussed has been resurrected ... do you have current view? We currenrtly have an unopposed proposal from May. Klbrain (talk) 16:15, 17 November 2023 (UTC)
 * No problem with integration. LendingWiki (talk) 00:00, 4 December 2023 (UTC)


 * ✅, simply, and it would be great if someone with subject knowledge could jump in and do a more refined job of improving the joint article. It's very unclear to me whether there is just one topic here, two closely-related topics, or a spectum of approaches with overlapping nomenclature (which I suspect from the discussion and text). Klbrain (talk) 16:13, 20 December 2023 (UTC)

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