Can I tie-dye cloth without alum?

Tie-dyed fabrics can be dyed without alum, but the fixation of tie-dyed fabrics is not strong and it is easy to fade. It is better to put alum. Tie-dyeing is to enrich and change the color of cloth with the help of mordant. In terms of dyeing effect, the tones/hues dyed by different dyes will be slightly different. Patterns and ornamentation can be made into different lines with hemp rope.