Nitivy's Solvron® yarn.

Multi-Filament PVA (polyvinyl alcohol). 220 Dtex (1/45 Nm).

Solvron® is a synthetic yarn of the Polyvinyl Alcohol (PVA) family. It is easily dissolvable by plain warm or hot water with no aid of any chemical agents, because of its ready solubility, Solvron® itself is not usable for ordinary wear apparels. 

It can be used in a number of ways including, for reinforcement or support of low-strength yarn in creating pile, as a separation yarn (draw thread) for knitwear.

Dissolving guide:

To ensure quick and even dissolving, heat up the water to a needed temperature first and then submerge Solvron® directly into the hot water.

If it is placed first into cold water, under tension-free status, and water temperature is raised gradually, it will start shrinking without breaking or dismembering. As the temperature rises to a needed degree, only then will it dissolve away in hot water.

Starts to dissolve at 30^oC, dissolves completely between 50 - 55^oC.