So it had to be tried! I took:<\/p>\n\n
- \n
- One 10 g test skein of wool, mordanted in my usual way: prepare a solution containing 10% alun. That means if you have 100 g of wool, put 10 g of alun in the pot. Dissolve the alun, add clean and completely wet wool, and heat it to about 90C for an hour. Then, I always just let it cool off in the solution until the next day<\/li>\n\n\n\n
- One 10 g test skein of wool, mordanted by leaving it in a cold 10% solution of alun for 24 hours.<\/li>\n<\/ul>\n\n
Both skeins then went into the same dye bath in order to compare them directly. The dye bath consisted of 40 g of dried heather from last fall, I had wanted to try that for the longest time, to see if heather yellow is warm or cold. And the result:<\/p>\n\n
![\"testskeins\"](\"https:\/\/midgaardshave.dk\/wp-content\/uploads\/2015\/03\/testskeins-1024x637.jpg\")
<\/figure>\n\n<\/p>\n\n
I am not able to tell the skeins apart, so the conclusion is that cold mordanting us just as good as hot. I think this is great news, because it really saves electricity!<\/p>\n\n
The heater’s yellow is a wonderful warm tone, so I will definitely collect more this fall. Next time I dye with heather, though, it should be boiled and the dye bath strained before the wool goes in. The heather twigs are very difficult to remove – they are like small hooks inserted in the yarn.<\/p>\n\n
<\/p>\n\n
\r\nFACTS – HEATHER <\/b><\/p>\r\n<\/div>\r\n\n
\r\nMordanting 10% alum hot or cold<\/b><\/p>\r\n<\/div>\r\n\n
\r\nWater Tap <\/b><\/p>\r\n<\/div>\r\n\n
\r\nYarn Supersoft 575 m\/100 g<\/b><\/p>\r\n<\/div>\r\n\n
\r\nYarn:Dyestuff ratio dry 1:2<\/b><\/p>\r\n<\/div>\r\n\n
\r\nConclusion Heating is not necessary for alun mordanting!\u00a0\u00a0<\/b><\/p>\r\n<\/div>\r\n\nHeather yellow is warm and wonderful\n\n
\r\nPossible improvements Remove heather twigs before adding yarn<\/b><\/p>\r\n<\/div>\r\n\n
Save<\/span><\/p>\n\n
Save<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
Recently, I have wondered how much it is really necessary to heat wool when you mordant it. To the usual 80-90C? Or would 60C be enough? (Yes I wondered about that because I ruined some yarn, and I think I overheated it!) So I turned to the knowledgeable people on Ravelry’s natural dyeing forum for […]<\/p>\n","protected":false},"author":1,"featured_media":34436,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[615,551,553],"tags":[635,636,564,575],"_links":{"self":[{"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/posts\/39769"}],"collection":[{"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/comments?post=39769"}],"version-history":[{"count":3,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/posts\/39769\/revisions"}],"predecessor-version":[{"id":39849,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/posts\/39769\/revisions\/39849"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/media\/34436"}],"wp:attachment":[{"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/media?parent=39769"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/categories?post=39769"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/midgaardshave.dk\/en\/wp-json\/wp\/v2\/tags?post=39769"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}