Bleach Stencil Tutorial: How to Get Crisp, Clean Designs
My Bleach Stencil Technique — Full Free Tutorial
So many of you have been asking about this on social media — so here it is! This is exactly how I create crisp, clean bleach stencil designs on fabric. There are lots of ways to do stencil art with bleach, but this is my method, refined through a lot of trial and error.
Want to recreate the exact design shown in the video? [Find it in my store →]
Materials note: I make all my stencils from 7 mil mylar — it's bleach-resistant, thin enough for fine detail, and durable enough for multiple uses.
What You'll Need
For gluing the stencil:
- Your stencil (7 mil mylar)
- White school glue
- A brush
- Newspaper (or something to protect your work surface)
- Thick tape
For the bleach dilution:
- Cornstarch
- Bleach
- Two small measuring cups (one for each)
- A small mixing container + a dedicated spoon (don't use it for food again!)
- Gloves and a respirator mask
For painting:
- Synthetic sponges, cut into smaller pieces
Step 1: Glue the Stencil to the Fabric
- Drip white school glue generously all over the stencil, then spread it evenly with a brush.
- Don't be shy with the glue — any spot that isn't properly stuck down gives bleach a chance to creep underneath the stencil. Crisp lines start here.
- Carefully place the stencil onto your fabric. If your design is centered, mark the fabric lightly beforehand — once the stencil touches down, it's hard to reposition.
- Press down firmly across every part of the design, including the small details.
- Tape down the edges of the stencil with thick tape to prevent accidental bleaching outside the design. Smooth out any wrinkles firmly (I use my nail) — wrinkles are another entry point for bleach.
💡 Why white glue? It bonds well to fabric but washes out completely with just water — no residue, no hassle.
Step 2: Mix the Bleach & Cornstarch
- Put on your gloves and respirator mask.
- Measure 30ml of bleach.
- Measure the same size cup (30ml), but fill it just slightly over the top with cornstarch.
- Mix thoroughly. The mixture will start out runny — let it sit for about 5 minutes to thicken slightly.
⏱️ Timing matters: The mixture loses potency around the 40-minute mark. That's plenty of time for one stencil, but if you're doing multiple pieces, mix a fresh batch as needed.
Your final consistency should be runny, but not watery — too thick, and you'll struggle with fine details.
Step 3: Paint the Stencil
- Dip a synthetic sponge into the mixture and squeeze lightly so it's wet but not dripping.
- Apply with gentle, firm pressure in a circular motion — pressing too hard risks lifting the glued edges.
- Go over each section a few times for even coverage, reloading the sponge as it dries out.
⚠️ Sponge tip: Use synthetic sponges only — natural ones dissolve in the mixture. Even synthetic sponges only last about 10 stencils, so I cut mine into pieces to get more mileage, and keep a few spares on hand.
Step 4: Dry & Remove the Stencil
- Dry completely before moving on — speed it up with a hairdryer, or let it air dry (mine dries in about 30 minutes in the Spanish sun!).
- Remove the stencil under running water. As the fabric gets wet, the glue dissolves and the stencil lifts away easily — this is the safest method and keeps your stencil reusable.
🙈 Confession: You'll sometimes see me rip the stencil straight off in my videos — I really don't recommend this, it can damage the stencil! I only get away with it because I make my own and can just cut a replacement. The water method is the proper way to go.
Step 5: Finish Up
Neutralize and wash your piece as you normally would after painting with bleach on fabric. Need a refresher? That tutorial is pinned to the top of my social pages.
Get Everything You Need
- Stencil designs → available in my store
- Respirator masks, gloves, blank tees, sponges & more → also in my store
I hope this was helpful! Please share whatever you create — I'd love to see it — and message me anytime if you have questions. 💛