The bought venetian blinds needs cleaning. The specific cleaning process is as follows: daub venetian blinds with coarse salt and flour again and rub it repeatedly. Flour can take away the stolen goods from venetian blinds, but coarse salt particles can inhibit this effect. Applying vinegar to tripe can get rid of peculiar smell. Rinse the tripe with clear water and put it on a plate.

In fact, the untreated cowleaves are usually black or yellow-brown, the cowleaves grown on feed are black, and the cowleaves grown on food crops are yellow-brown. It is difficult to wash Venice beef white.

You can also clean it like this: cut the washed fresh beef tripe into large pieces, put it in a big basin, then pour boiling water into the beef tripe, and then stir the beef tripe continuously with a wooden stick for about 3 minutes. Take out the scalded beef louver and put it on the chopping board. Rub the black or brown film on it hard, rinse it with water while rubbing, and add some fine salt and white vinegar to rub it together for better effect.

After such cleaning, cowhide will become clean and beautiful, but it is absolutely impossible to wash cowhide as white as snow. White beef venetian blinds are first soaked in caustic soda water and then bleached with hydrogen peroxide. A catty of fresh beef louver can weigh up to three catties. I suggest you try not to buy it.