this post was submitted on 08 Sep 2024
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Various recipes say it both dyes and adds to waterproofing by filling in the gaps in the weave.
Now that I think about it, I'm wondering if the weave was too loose to hold the particles. I wanted something lighter than a full weight canvas so I used a seemingly tightly woven linen tablecloth. I hot washed it to shrink/tighten it further before applying the treatment, but I've noticed I can still see light through the fabric.
We live and learn I guess. Bit of an expensive experiment, but it's an excuse to try again. I prefer the natural linseed colour to the red of the iron oxide anyway.
So I hung out out in the weather and sure enough most of it is more dry now (even after a few bits of rain) and the boys that are dry don't shed powder. There are still bits of oil damp spots, and they still release powder. Patience I guess.