Materials:
- starch;
- stain remover “Vanish Oxi Action” or an analogue with a similar composition;
- hydrogen peroxide 30%.
The process of preparing a mixture for bleaching plastic
When bleaching small parts, a liquid mixture is prepared to soak them in a bath. If you need to clean a large case, then mix the composition in the form of a gel, which is spread on top. Due to its thickness, it will remain on the surface. Starch can be used as a thickener.
When preparing the cleaning mixture, it is optimal to use 8-13% peroxide. Finding it on sale is quite difficult. It’s easier to buy a 30% concentrate at a chemical store and dilute it with water in a 1:2 ratio.
To prepare the composition, you need to dissolve the stain remover in warm water. Take literally 20-30 ml of water and a quarter teaspoon of “Vanish Oxi Action” or its equivalent. This will be enough for 300 ml of the finished product.
Then stir 4 tablespoons of any starch into 100 ml of cold water.
Once mixed, it needs to be brewed until it reaches a gel consistency. The solution is placed on fire and heated with constant stirring.
After a few minutes it will become viscous even before it boils. As soon as it acquires the consistency of jelly, the heating is turned off and the mixture is poured into a separate container.
200 ml of hydrogen peroxide 30% is added to the gel with constant stirring.
Then the previously dissolved stain remover is poured in.
The finished gel is spread onto the yellowed plastic parts with a paint brush. To prevent it from drying out, the part is wrapped in film and left for a day.
After time, the gel is washed off under running water, and after drying, the bleached body is placed back in its place.
If you can buy 8-13% hydrogen peroxide to prepare the product, then water is not used. Take 300 ml of peroxide and a quarter teaspoon of stain remover at once. In order not to heat the peroxide, it is better to use cheap wallpaper glue based on starch as a thickener; it thickens in cold liquid.
