Copyright © 2018 Burnham-
George kicked off the new year with an excellent demonstration of the use of water based colours. One of George’s main skills is the production of decorated bowls and up until now he has used spirit based colours and you will find several examples of these in the galleries section of this website. The advantages of water based colours is that they allow the grain patterns to show through even after several successive applications of different colours and additionally, in the more eco conscious environment in which we now live, water based colours are more eco friendly.
The colours George used were from the Martin Saban-
George came prepared with 2 part turned bowl blanks and starting with the nicely grained sycamore blank he first covered the basics of bowl turning. The blank had been part turned a year ago when at 30% moisture content which had subsequently reduced to about 18%.
Top Tip 1 -
Top Tip 2 -
Mounting the blank in the chuck the first task was to level and finish the top flat surface using a pull cut with a bowl gouge, then sharp scraper and finally with abrasive after turning the lathe speed down to reduce heat.
Top Tip 3 -
Top Tip 4 -
Time to apply the first water based colour. In both demonstrations this evening George used black as the first colour which as we saw enhanced the grain and ensured that this enhancement was maintained through to the finished piece. After completely covering with black colour, dry with a hair dryer, wipe over and use 320grit again to retain all but the required bits of black enhancement. Note that unlike spirit based colour, water based colour tends not to bleed into end grain.
Top Tip 5 -
It was then a matter of adding and blending the join between different colours as required, hair drying and sanding intermediate stages when necessary. Finally, on this piece, George added a honey colour on the grainy part of the surface as a highlight.
To finish the piece George wiped over danish oil, then neat cellulose sealer, and finally polish.
The second bowl that George demonstrated with was a beech blank and using the same techniques but with black, forest green, plum and flame red and omitting the danish oil.
Thanks to George for a very interesting demonstration -
Apologies for the colour quality of the photos -