Waxed linen thread 'Au Chinois' n°40, 50gr reel (about 350m).

The word “Retors” means that the thread has been re-twisted, a necessary operation in thread production.
This one is three strands that have been twisted together to give a smooth, resistant thread often used in leather work. It's a high quality thread which can be used for quality jewelry making, leather goods (saddle stitch) and ideal for sewing buttons and make the thread inside the buttonhole made by hand.

This linen thread is waxed, which means it has passed through a starch bath to which bees wax has been added. It is then brushed with horse hair and stretched. These operations ensure a thread which is smooth and resistant for the most rigid stitches.