Stain file № 4629 · Kids and craft · Hard surfaces
How to get crayon out of plastic containers
Freeze it hard; scrape off the excess; degrease with dish soap. Never microwaving it. Easy on plastic containers if you act quickly.
- Editorial difficulty
- Easy
- Estimated hands-on
- 11 min + 10 min waiting
- It sets
- in a hot dryer
- Kit
- 3 items + 2 tools
01 The short answer
To get crayon out of plastic containers, work in this order: (1) freeze it hard; (2) scrape off the excess; (3) degrease with dish soap; (4) oxygen bleach soak. The key measure: bag of ice for 10 min, then chip it off. Test oxygen bleach on a hidden spot first. Wash in warm soapy water and let it air-dry.
This has a lower editorial difficulty rating, not a measured success rate. Results depend on the actual fabric, dye, finish and age of the stain.
02 Never do this
- Microwaving sauces in it. Hot oil carries pigment into the plastic and sets the stain.
03 Before you start
- Use white cloths or paper towels only: coloured ones can transfer their own dye into plastic containers.
- Follow the container manufacturer instructions for cleaning and food use; avoid unapproved solvents or abrasives.
- Pretest every permitted treatment on an inconspicuous area, including trims, and let it dry. Stop for colour transfer, lightening, rings, stiffness or distortion. A successful spot test does not guarantee the whole item is safe.
- The listed products are not permission to combine treatments. Use each only if the exact item and product labels permit it, including any change of product. Rinsing or blotting does not establish compatibility; ask the manufacturers or a professional if unsure.
04 The method
Freeze it hard
Hold a sealed bag of ice cubes on it for 5–10 minutes until it is hard and brittle. Small washable items can go in the freezer in a bag for an hour instead.
Why it works: Cold turns soft wax and gum polymers glassy, so they snap off instead of stretching into the fibres.
2 min hands-on · 10 min waiting
Scrape off the excess
Lift any solids or excess with a spoon or the dull edge of a knife, scooping towards the centre. Do not press down: you want it off the plastic containers, not into it.
Why it works: Every bit of solid removed now is pigment and fat that never soaks in.
2 min hands-on
Degrease with dish soap
Rub a few drops of dish soap into the stained area with your fingers, then wash in warm (not boiling) soapy water.
Why it works: Crayon colour is oil-soluble, and the plastic is oil-loving too; soap pulls the colour back out of the surface.
3 min hands-on
Oxygen bleach soak
Only if both the item and product labels permit oxygen bleach: use the stated amount, water temperature and contact time for that exact product. Dissolve powder as directed, pretest colours, rinse thoroughly, and never add other cleaners or store the solution sealed. Stop if appearance changes.
Why it works: It oxidises the colour that has dissolved into the plastic.
2 min hands-on
Wash and air
Wash in warm soapy water and let it air-dry. Next time, coat the container with a little cooking spray before adding tomato or curry.
Why it works: A thin oil film keeps pigment from dissolving into the plastic.
2 min hands-on
Test first: oxygen bleach on plastic containers. Avoid abrasives on clear plastic; they leave a cloudy scuff that holds the next stain.
05 Dried, set, or back again?
This has a lower editorial difficulty rating, not a measured success rate. Results depend on the actual fabric, dye, finish and age of the stain.
Assess the mark only once the item has dried according to its care instructions. If it remains, do not keep repeating or strengthening treatment; obtain advice for the exact material and product.
06 What crayon is made of
- Wax
- Pigment particles
Crayon contains wax, which is solid at room temperature. Cold makes it brittle enough to snap off; gentle heat melts it so it can be drawn into paper.
Crayon can contain pigment particles that do not dissolve readily in water. Many must be lifted with an appropriate cleaner rather than relying on bleach. Avoid grinding particles into the material; pigment chemistry and product formulas vary.
- Crayons are paraffin wax and pigment. One crayon left in a pocket can melt across a whole dryer load and coat the drum.
- Paraffin melts at roughly 50–60 °C, so an iron on low over paper towels lifts it up out of fabric.
07 The material: plastic containers
It tolerates hot water (up to about 60 °C (140 °F)) for the final wash, but only after any protein has been rinsed out cold.
- Tomato and turmeric stains are oil-soluble pigments, and plastic is oil-loving too, so the colour dissolves into the plastic itself.
- Sunlight breaks down lycopene and curcumin: a stained container left in a sunny window often clears in a day or two.
The plastic containers file rates every common cleaner for it.
08 Next time
Check every pocket before washing and drying, and give children washable crayons and wipeable walls (satin or eggshell paint).
09 Questions
Can I use hot water on crayon on plastic containers?
Warm water helps here once the first steps are done; stay within the care label (up to 60 °C (140 °F)) and check the stain has gone before any dryer.
Does vinegar help with crayon on plastic containers?
It is not needed for crayon. Vinegar is a mild acid that helps with tannin and mineral residue; crayon responds better to ice and dish soap.
Can I use bleach on crayon?
Only on white, bleach-safe cotton and only as a last step, diluted per the label. Oxygen bleach usually does the job without the risks.
Will crayon come out of plastic containers completely?
This has a lower editorial difficulty rating, not a measured success rate. Results depend on the actual fabric, dye, finish and age of the stain.
When should I call a professional?
Not needed; deeply stained containers can be retired to non-food use.