Production Soap RTV: Shore, Bow, Logo, Cavity Count
A soap tray designed for the finished bar, not the wet loaf, is how the sheet bananas and a logo island tears on unmold day. If you are locking a production soap RTV, this page is that engineering: condition at demold, loaded bow, Shore vs peel, logo geometry, and why 12-20 cavities can beat 50. Cold-process, melt-and-pour, and other batters do not share one Shore.
RUUIPON pours reusable platinum RTV soap tools in Bao'an, Shenzhen (Licheng Technology Industry Park, Xinhe Blvd, Shajing; USCC 91440300MA5FAXCN9W) since 2018. Simple 3D is USD 50 when that CAD scope applies. Prototype is 3-7 business days after CAD lock. Production is MOQ 20 pieces per design. Soap tools are not food-contact trays - we will not hang 21 CFR 177.2600 or LFGB papers on a CP cavity. The SKU lives on custom silicone soap molds.
Where this page sits
Buy the mold and fragrance / bath framing on custom silicone soap molds. The family hub is candle, soap, and wax-melt solutions. This page covers production engineering: wet load, Shore, logo, count.
Start with the bar
Lock length, width, thickness, target grams, process, pour temperature if relevant, set time before demold, logo location, edge radius, and pieces per batch. Then choose cavity count. Starting from "we want 50" often makes a tray too large, too heavy, or too slow to peel.
Cold-process is a loaded tray
Fresh CP is heavy, soft, and weak. A large sheet can sag, twist, tilt outer cavities, and move the top plane. Empty-flat is not loaded-flat. For large layouts review nest, border, web, lift method, and full wet weight. Let the rigid support carry global stiffness; keep the silicone flexible for release.
Typical shop values
Reference values only. Confirm material-specific limits against the supplier’s technical data and agree project acceptance criteria before production. No universal Shore table.
| Item | Typical shop value |
|---|---|
| Design question | Hold the wet load and still peel without tearing bar or mold |
| Cavity Shore | Softer for deep logos / texture; firmer for a large span - prototype the batter |
| 50-up vs 12-20 | 50-up only if nest, lift, and web survive; else split the batch |
| Logo | Review stroke, depth, radius at unmold-day strength, not the render |
| Proof | Full production span in the real soap, not one cavity |
| 3D / CAD | USD 50 when that modeling scope applies |
| Prototype after CAD lock | 3-7 business days |
| Production after written pass | MOQ 20 pieces per design |
| Contact | [email protected] · +86 135 3006 2969 |
Shore and logo
Softer rubber peels emboss, ribs, undercuts, and texture. Firmer rubber handles a large tray and can raise demold force. Right answer depends on depth, logo, span, support, and soap strength at demold. A recessed logo on the bar is a raised silicone island. A raised logo is a pocket that can trap batter and air. Acceptance is the real unmold, not a clean 3D view.
Count and webs
One 50-up tray means fewer pours and one ID - and high wet weight, a large fixture, hard lift, long demold, and one tear taking 50 cavities offline. Two 25-up trays can be easier to handle and replace. Closely packed cavities leave thin webs that flex every peel. Inspect minimum section at full depth, not only top-view pitch.
Demold and chemistry
Write the method: nest off, border first, one row at a time, push only where the cavity is meant to flex, do not pull a fresh bar by the logo. Improvised picks start the same corner tear. Track process, fragrance, set time, wash, storage, and failure location. One fragrance that swells is chemistry. Every mold tearing at one island is geometry. We will not promise a cycle count.
Worked example: CP loaf logo
Typical job, not a named PO. Buyer wanted 50-up with a deep wordmark. We cut to two 18-up nests, drafted the serifs, and prototype-poured the real batter. The 50-up render never showed the wet bow or the island tear on pull 3.
When this page does not apply
This engineering page does not replace custom silicone soap molds or the candle and soap hub. It does not apply to chocolate or pectin (food dumps). It does not apply to wax melts sold by grams - that is a different product page. HCR compression products and molds stay on a RUUIPON HTV RFQ. High-volume LSR cold-runner part tools are a different RFQ - ask us.
RFQs we will not accept as-is
Picking 50 cavities with no wet-weight or nest. Copying chocolate Shore onto CP. Hanging FDA / LFGB papers on a soap tray. Approving a logo from CAD only. Sending an HCR / LSR part through this RTV soap page.
Matched next step
Send bar size and grams, CP vs melt-and-pour, logo artwork, and target pieces per batch. We will name Shore, nest, and count. "Soap mold, 50 cavities" is not enough.
Send bar, process, and logo · Soap product · Candle and soap hub
[email protected] · +86 135 3006 2969 · Licheng Technology Industry Park, Xinhe Blvd, Shajing, Bao'an, Shenzhen. USCC 91440300MA5FAXCN9W.
FAQ
Is this the soap product page? No. Buy the mold there. Engineering lives here.
Can we skip the nest on a large CP tray? Only if loaded flatness stays inside your grams. Most 50-up sheets cannot.
Do you quote food papers on soap? No.
What is MOQ after a pass? 20 pieces per design.
When is USD 50 3D in scope? Simple cavity-map modeling. Sculpture rebuild is quoted separately.