At that time (the beginning of the 20th century), cheaper, but nevertheless, durable varnishes were made of rosin — the pitchfork of the resin, which was made of coniferous wood (mainly pine). These varnishes often included polymerized vegetable oils. This varnish allows you to make viscous and thick, and always these varnishes were primarily waterproof materials. Things revealed by such varnish are able to possess viscosity and elasticity at the same time, despite their rather low quality, they served their owners by faith and truth for a lot of years.
