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Dyeing at room temp




I run a small type 2 anodizing shop, and currently my black dye sits at room temperature, the parts come out just fine. I'm wondering if anyone else out there runs their dyes at room temperature without problems. Everything I read says keep the dye around 140F, but the saying goes "don't fix what isn't broken". I'm curious at if it will work for other types of dyes as well. Thanks for any feedback.

Ryan Z
- Gainesville, Florida, US
2006



2006

Dyeing at room temperature is generally OK. Still need high temperature sealing. Disadvantages are
1) Slower dye penetration into the anodize pores.
2) Chance of yeast growing in the dye (may need a biocide).
3) Without evaporation losses, cannot easily recover dye via a DI water drag-out rinse.
4) Don't notice porosity problems in some castings (trapped electrolyte).

Of course, you save on heating, and it is easier to tightly cover tanks not in use.

Ken Vlach [deceased]
- Goleta, California

contributor of the year Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.





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