How to Design a Logo Gummy or Chocolate Mold That Demolds Cleanly
Adding a logo to your gummy or chocolate mold seems straightforward — emboss your brand name or design onto the cavity, and the product comes out with your
Kyler Yang · Founder5 min read
Introduction
Adding a logo to your gummy or chocolate mold seems straightforward — emboss your brand name or design onto the cavity, and the product comes out with your branding. But logo embossing introduces real engineering challenges: detail reproduction, draft angles, demolding force, and wear resistance. Get it wrong, and your logos come out blurry, your products tear on removal, or your molds wear out prematurely.
This guide covers the engineering principles behind clean logo demolding, so you can design molds that reproduce your branding sharply and release reliably.
The Logo Embossing Challenge
Why Logo Demolding Is Harder Than Plain Cavities
| Factor | Plain Cavity | Logo Cavity |
|---|---|---|
| Surface complexity | Smooth, uniform | Textured, varied depth |
| Release force | Even across cavity | Variable — high points resist release |
| Detail fidelity | Limited by cavity shape | Limited by logo line width and depth |
| Wear pattern | Even | Concentrated on logo edges |
Common Logo Demolding Problems
| Problem | Cause | Solution |
|---|---|---|
| Blurry logo | Insufficient detail resolution in master | Use higher-resolution master (SLA at 25μm) |
| Torn logo edges | Insufficient draft angle | Add 2–3° draft to logo features |
| Sticking on logo | Deep emboss without proper release angle | Redesign logo depth or add release channels |
| Logo wears out | Abrasive materials or frequent demolding | Use harder durometer (25A+) for high-wear areas |
| Incomplete fill | Air trapped in logo details | Optimize pour gate placement and venting |
Logo Design Specifications
Minimum Feature Size
| Feature | Minimum Size | Notes |
|---|---|---|
| Line width | 0.5mm | Thinner lines may not reproduce reliably |
| Line depth | 0.3–0.8mm | Too deep = sticking; too shallow = faint |
| Character height | 2mm minimum | Smaller text is hard to read on product |
| Corner radius | 0.3mm minimum | Sharp corners stress silicone during demolding |
Logo Depth Guide
| Logo Depth | Reproduction Quality | Demolding Risk | Best For |
|---|---|---|---|
| 0.3mm | Good | Low | Subtle branding, high-speed production |
| 0.5mm | Excellent | Low–Medium | Standard logo embossing |
| 0.8mm | Excellent | Medium | Bold branding, larger logos |
| 1.0mm+ | Excellent | High | Artistic designs; requires careful draft angles |
Draft Angles for Logo Features
Why Draft Angles Matter
Draft angles are the slight taper built into vertical features to help products release from molds. For logo embossing, draft angles are critical because:
1. Logo features have vertical walls — Without draft, silicone grips these walls during demolding 2. Small features are fragile — Thin logo lines are the first to tear or wear 3. Release force concentrates on logo — The logo area experiences the highest demolding stress
Recommended Draft Angles
| Feature Type | Minimum Draft Angle | Notes |
|---|---|---|
| Logo text (vertical walls) | 2–3° | Perpendicular to parting line |
| Logo background (recessed) | 1–2° | Shallow recesses need less draft |
| Logo background (deep) | 2–3° | Deep recesses need more draft |
| Decorative edges | 1–2° | Softer features need less draft |
How We Apply Draft in Design
During the CAD phase, our engineering team: 1. Analyzes the logo geometry for undercuts 2. Adds draft angles to all vertical logo features 3. Rounds sharp corners to reduce stress concentration 4. Simulates demolding forces to identify high-stress areas 5. Adjusts design before master fabrication
Pour Gate Placement for Logo Molds
The Problem
Pouring material into a cavity with an embossed logo can trap air under the logo details, causing incomplete fill or bubbles in the branding area.
Solutions
| Pour Gate Location | Best For | Why It Works |
|---|---|---|
| Opposite logo side | Most logo molds | Material flows away from logo, pushing air out |
| Center pour with venting | Symmetric logo designs | Balanced flow; vents capture trapped air |
| Edge gate (flood-and-scrape) | Multi-cavity logo trays | Uniform fill across all cavities |
| Multiple small gates | Large logo areas | Reduces flow distance, minimizes air entrapment |
Venting for Logo Cavities
| Vent Type | Placement | Purpose |
|---|---|---|
| Edge vent | Cavity perimeter, opposite pour side | Main air escape path |
| Logo detail vent | Near logo features | Captures air trapped under logo lines |
| Deep cavity vent | Bottom of deep logo recesses | Prevents air pockets in deep embossing |
Logo Material and Durometer Selection
Durometer Impact on Logo Quality
| Durometer | Logo Detail | Demolding | Wear Resistance | Best For |
|---|---|---|---|---|
| 15A | Excellent | Excellent (flexible) | Lower | Complex undercuts, delicate logos |
| 20A | Excellent | Good | Good | Standard gummy and chocolate logos |
| 25A | Good | Good | High | High-volume production, abrasive materials |
| 30A | Good | Fair | Very High | Heavy-duty applications, baking molds |
Recommendation
For most logo gummy and chocolate molds, 20A–25A Shore A provides the best balance of detail reproduction, reliable demolding, and wear resistance.
Master Model Quality for Logo Reproduction
The master model is the negative of your logo — its quality directly determines logo clarity on the final product.
| Master Quality Factor | Impact on Logo | Best Practice |
|---|---|---|
| Layer height (SLA) | 25μm = sharper detail vs. 50μm | Use 25μm for fine logo text |
| Surface finish | Smooth master = smooth logo | Post-process master surface |
| Orientation on build plate | Layer lines show on vertical surfaces | Orient logo flat for minimal layer lines |
| Post-curing | Under-cured masters distort | Full UV post-cure before silicone pour |
Logo Demolding Test Protocol
Before approving a logo mold for production, run this test:
| Step | Action | Pass Criteria |
|---|---|---|
| 1 | Produce 10 test pieces with logo | All 10 have readable logos |
| 2 | Inspect logo sharpness under magnification | No blurring, tearing, or incomplete fill |
| 3 | Demold all 10 pieces | No logo damage during removal |
| 4 | Repeat for 50 pieces | Consistent logo quality maintained |
| 5 | Inspect mold after 50 cycles | Logo detail still sharp, no wear marks |
FAQ
Q: What's the smallest text I can emboss on a gummy mold? A: We recommend a minimum character height of 2mm and line width of 0.5mm for reliable reproduction. Anything smaller may appear blurry or incomplete on the final product.
Q: Can I put a logo on both the top and bottom of a gummy? A: Yes, but it requires a two-piece mold with logo details on both halves. This doubles the complexity and cost. For most applications, a single-sided logo on the top surface is sufficient.
Q: How do I know if my logo design will demold cleanly? A: Send your logo design to our engineering team. We'll run a DFM analysis and simulate the demolding process before you commit to tooling.
Q: Will logo embossing affect weight consistency? A: Logo embossing removes a small amount of cavity volume (typically <1%). For most applications, this is negligible. For CBD/THC products requiring a job-specific weight band after DFM accuracy, we account for logo volume in the cavity design.
Q: How many times can I demold before the logo wears out? A: With 20A durometer silicone and proper draft angles, logo detail typically remains sharp for 500+ demolding cycles. Higher durometer (25A+) extends wear life for high-volume production.
Request a Logo Mold Quote
Send us your logo (AI/EPS/SVG format preferred) and product specifications. Our engineering team will review the design for demold feasibility and provide a detailed quote.
*Published: 2026-08-13 | Category: Design Guide | Read Time: 9 minutes*
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