Memachaik

From Halachipedia

The Mishnah in Masechet Shabbat (73a) lists memachaik as one of the 39 Avot Melachot.

Definition

  1. This melacha is defined as scraping or removing a surface in order to leave a smooth remainder. For example, using sandpaper to smooth wood, or scraping hairs off a piece of leather to make it smooth [1]

In the Mishkan

  1. In the mishkan, memachaik was performed to smooth the ram’s hides by removing the hairs as part of the processing of the leather [2]

Toladot

Mimareach

  1. One of the toladot of this melacha is mimareach-smoothing not by eliminating surface, but by spreading something over the surface. [3]

Practical Issues

Brushing Teeth

see Brushing Teeth on Shabbat

Cosmetics

see Cosmetics page

Cleaning Shoes

  1. One should not use a knife to scrape the mud off of leather shoes since you will inevitably smooth the leather. [4]

References

  1. Rambam Hilchot Shabbat 11:5
  2. 39 Melachot Rabbi Ribiat pg. 913.
  3. Rambam Hilchot Shabbat 11:6
  4. Gemara Shabbat 141b, Shulchan Aruch 302:8, 39 Melachot pg. 914-915