$$ mathrm R file=frac mathrm Distance mathrm travelled mathrm by mathrm the mathrm solute still left(mathrm cm ideal) mathrm Length mathrm travelled mathrm by mathrm the mathrm solvent remaining(mathrm cm appropriate) $$In advance of rosin tech dabs rose to attractiveness, the OG solventless extracts fell beneath the “melt” category.