section 5

Fibers can be obtained from:

• Chemical solutions

• Animal hair/fur

• Plants - stems, seeds, leaves, fruit

• Plastic

A material similar to leather can be produced by:

• Growing mycelium on liquid kombucha

• Growing yeast (and bacteria) on liquid kombucha

• Growing fungi on sawdust, harvesting mushrooms, pressing them into sheets

• Growing fungi on sawdust and harvesting the mycelium

When performing a burn test on natural plant fibers:

• Often produces a sticky black ash and smells musty

• Often produces a black bead and smells like burning hair

• Often produces a small bead and smells very irritating

• Often produces a soft ash and smells like burning paper

Tags

NGSS.MS-PS3-4

When performing a burn test on synthetic fabrics like acetate and nylon

• 
  Often produces a black bead and smells like burning hair

• Often produces a sticky black ash and smells musty

• 
  Often produces a soft ash and smells like burning paper

• 
  Often produces a small bead and smells very irritating

Tags

NGSS.MS-PS1-2

Does the type of fabric impact how it can be dyed?

• 
  Not at all. All dyes work the same regardless of the fabric type.

  
  

• Yes - Synthetic fibers absorb any dye, faster than natural dyes 

• Yes - Natural fibers have pores (holes) that allow dyes to bond easily.

Which of these things may impact the result of dyeing?

• The ratio of mordant and dye

• Drying the fabric - direct sunlight can lighten color

• The type of water used (soft vs. hard)

• The container (vessel) that you use - metal can impact the resulting color

Select the correct information about pH and it's impact on dyeing:

• Soft water (pH 6-7) is best for synthetic dyes

• To increase pH (hard water): soda ash, ammonia, or wood ash can be added

• To decrease pH (acidic): vinegar or lemon juice can be added

• pH is a scale: acidic (8-14) and basic (0-6)

To calculate the amount of dye needed for an amount of fabric: 

• If the dye recipe says 8% WOF (Weight of Fabric)

• And you have 300 grams of yarn

How much dye (in weight) would you need?

• 40 grams

• 400 grams

• 240 grams

• 24 grams

Select which options apply to a mordant.

• Mordants are only plant-based

• It can prevent the color fading over time

• A specific mordant will work the same way with every dye and fabric type

• A substance added to improve how the dye attaches to fabric

Which of these terms refers to a type of fabric (or way that fibers are arranged to make a fabric):

• Laminated

• Pile

• Felt

• Knit 

• Woven