{"id":4596,"date":"2020-09-23T12:38:47","date_gmt":"2020-09-23T11:38:47","guid":{"rendered":"http:\/\/www.hyam.net\/blog\/?p=4596"},"modified":"2020-09-23T12:40:13","modified_gmt":"2020-09-23T11:40:13","slug":"emulsion-3-graveyard-test","status":"publish","type":"post","link":"https:\/\/www.hyam.net\/blog\/archives\/4596","title":{"rendered":"Emulsion #3 – Graveyard test"},"content":{"rendered":"\n
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Third successful test. This is 10 minutes at f11. Overcast + under trees + 4pm in September at 56\u00b0 North.<\/figcaption><\/figure>\n\n\n\n

A week off the day job has given me time to work on my silver gelatine glass plate negatives. I’ve learnt a big lesson and results are much improved. <\/p>\n\n\n\n

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1st out the window test.<\/figcaption><\/figure><\/div>\n\n\n\n

For emulsions #1 & #2 I had downsized a larger recipe and got to a Potassium Iodide content of about 0.2g. My scales really don’t go that low so I put in about 0.5g. In hindsight suspect it was more than that. The resulting plates didn’t clear when fixed and were grainy. This time I calculated I actually needed about 0.15g iodide (to go with 4g bromide and 5g silver nitrate). To add that I made up 10% iodide solution and added 15ml (reducing other volumes appropriately). It turns out if you get the ratios nearer correct the emulsion works better! I need to do some research on the “correct” ratio of bromide to iodide for future emulsions.<\/p>\n\n\n\n

Now I have 17 plates coated with #3 and am off to the Deeside pine woods for a couple of days to see what I can get. <\/p>\n","protected":false},"excerpt":{"rendered":"

A week off the day job has given me time to work on my silver gelatine glass plate negatives. I’ve learnt a big lesson and results are much improved. For emulsions #1 & #2 I had downsized a larger recipe and got to a Potassium Iodide content of about 0.2g….<\/p>\n","protected":false},"author":3,"featured_media":4597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-4596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-photography"],"_links":{"self":[{"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/posts\/4596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/comments?post=4596"}],"version-history":[{"count":2,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/posts\/4596\/revisions"}],"predecessor-version":[{"id":4600,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/posts\/4596\/revisions\/4600"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/media\/4597"}],"wp:attachment":[{"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/media?parent=4596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/categories?post=4596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hyam.net\/blog\/wp-json\/wp\/v2\/tags?post=4596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}