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Colourfastness

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Blog series by shipwright updated 03-06-2018 03:40 AM 4 parts 7895 reads 72 comments total

Part 1: A Little Experiment ...

11-26-2017 12:21 AM by shipwright | 19 comments »

All woodworkers know about and battle with the issue of colourfastness but in marquetry it is more than just a pest, it can absolutely ruin your work. All one needs do is look at the great marquetry created by the French masters of the seventeenth and eighteenth centuries, today mostly dull arrangements of subtly different shades of brown. In an attempt to start to understand the factors at work in order to try to minimize their destruction, I am embarking on what I expect will become a se...

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Part 2: One Month Check-in, .... some surprises

01-02-2018 12:42 AM by shipwright | 16 comments »

Its been a month since I put my test panel out in the Az (winter) sun and there have been some changes and a couple of surprises. 1) Almost all of the bare wood has faded.2) The shellac alone seems to be the finish that is out of step.3) The Amaranth (Purpleheart) is ….. AMAZING!4) The Cherry is a surprise too. This is the original, before picture. Here is today’s. Sorry it’s upside down vs the above pic.The Amaranth is second from the top.The Cherry is second from th...

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Part 3: Two Months in the Sunshine

01-31-2018 11:41 PM by shipwright | 16 comments »

Well it has been two months now since I put my test piece out in the (winter) Az sun.Not a lot has changed but a few things are worth noting. 1) There seems to be little difference between the epoxy alone and the two with ten coats of uv filtered marine varnish. 2) The shellac alone has dulled noticeably but it has been the strip to watch for interesting change. 2a) The Amaranth is still very much redder than te under the other finishes and still appears “lit up” ...

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Part 4: Three Month Check In

03-06-2018 03:40 AM by shipwright | 21 comments »

This will be my last report on the sample finishes in the Az. sun. I’m heading home to Canada this week but the good news is that I have a friend who lives here year round and he is going to keep the experiment going. Things aren’t much different from last month but then the sun level wasn’t as high as usual in Az. The shellac alone still seems to be the odd man out. It is the only one that has kept the purple in the Purpleheart (Amaranth) and the Cherry continues to be very different u...

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