Traditional Culture Encyclopedia - Photography major - What can be used instead of photographic sulfuric acid paper?

What can be used instead of photographic sulfuric acid paper?

Soft paper (translucent paper, also known as waxed paper) used for packaging clothes and fruits.

If it is for convenience, it is understandable to spread sulfuric acid paper in front of the flash to reduce the light to a certain extent. However, the effect is that the light is uneven, and the brightness in the middle range of the flash is higher than the edge, which cannot increase the light source area.