Why We Will Not Use Tin RTV for Chocolate | RUUIPON

We will not spec tin-cure (condensation) RTV for a chocolate cavity — bars, shells, bombs, or logo chips. Couverture is a fatty, aromatic dump that sits in the well and then goes in someone's mouth. Tin leftovers and ongoing shrink fight that job. Platinum addition-cure, mixed 1:1 or 10:1 by weight, vacuumed, and documented as a 21 CFR 177.2600 and/or LFGB path on *this* article, is what we quote. A cheaper tin kit that "says food safe" on a marketplace card is not a substitute, and we will not match it.

RUUIPON pours those platinum chocolate tools in Bao'an, Xinhe Blvd, Shajing, since 2018. Prototype is 3–7 business days after CAD lock. Production is MOQ 20 pieces per design. Simple 3D is USD $50 when that CAD scope applies. Platinum shrink after a full cure is typically about 0.1–0.3%. Molded silicone *spatulas* or other kitchen *parts*: wydsilicone.com. Catalyst overview for food in general: platinum vs tin. This page is the chocolate refusal.

Does not apply when the dump is PU, plaster, or a decorative candle you will never plate food on. Tin can be a named craft choice there. It also does not apply to polycarbonate magnet chocolate molds — different tool family. LSR chocolate *is not a thing we pour here*.

Why couverture is a harder dump than "food" on a slide

Chocolate picks up odor. A condensation leftover that a plaster caster will ignore becomes a tasting-room complaint on pass one and two. Fat also shows colorant bleed and a greasy face faster than a pectin dump. Tin keeps moving dimensionally in storage; a logo that fit the bar wrapper in March can sit off-center in August. Platinum's typical 0.1–0.3% linear shrink after full cure is the compensation we will actually stand behind.

Inhibition is the platinum tax we accept: sulfur clay, latex, raw SLA. We slug and seal. We do not switch the chocolate RFQ to tin to dodge a dirty master. That dodge is how a "food tin" tray shows up with a craft TDS attached.

flowchart TD
  A[Chocolate RFQ] --> B{Buyer asked for tin?}
  B -->|yes| C[Refuse tin line — quote platinum]
  B -->|no, platinum| D[Name 177.2600 and/or LFGB]
  C --> D
  D --> E[Open-back vs split via Mold Structure Decision]
  E --> F[Jacket if loaded sheet]
  F --> G[Wash + post-cure before first dump]

The photo that would prove the refusal: tin kit card next to a platinum traveler with "chocolate — tin not quoted" in the notes. We do not need a tasting-room portrait.

Magnetic PC molds and silicone trays are different objects. If you already run PC, do not ask us to "make that in food tin, cheaper." We quote platinum RTV or we send you back to PC.

Typical shop values

Caption: typical shop values, not a named PO.

Loaded-tray edge sag is still about 0.5–1.5 mm without a jacket. ISO 3302-1 M2 is a common dump class on the bar, not a catalyst.

Refusals we will write on the quote

We would not spec tin-cure under couverture. Full stop on this shop's chocolate tools.

We would not recommend using a platinum food extraction PDF to bless a tin recast you poured in-house.

We would not recommend skipping vacuum on a chocolate logo because a tin hobby video did.

We would not recommend calling the factory FDA-approved. Extraction is on the article.

A tooling charge is not unrestricted ownership of the compound name. Ask for the grade on the PO if you recast.

Worked example: 16-cavity shell, "food tin cheaper"

Sixteen-cavity retail shell, US plus later EU listing. First RFQ said food-grade tin to hit a price. We refused the tin line, quoted platinum ~25A open-back with jacket, $50 CAD because the STEP had no fill line, locked CAD, poured in the 3–7 business day window, listed 177.2600 on that compound plus LFGB for the EU SKU. Production MOQ 20 of that design. Related: chocolate molds.

Bloom, temper, and a wet tin face are different complaints

Chocolate bloom is a temper and storage problem. A wet or greasy tin face is a tool problem. Buyers mash them into "the mold made it white." We still require temper. We still require a dry platinum well. We will not take a bloom photo as proof that tin would have been better. Tin leftover odor can ride along with bloom and make the tasting note worse. Fix catalyst first, then temper.

Polycarbonate magnet molds stay in the chocolate plant for high-volume bars. RTV is the custom logo, short-run, and undercut conversation. Do not force a tin RTV "because PC was expensive" if the real constraint was magnet plates. Name the tool family on the RFQ: PC, platinum RTV, or "help me choose." We choose platinum when the object is an RTV cavity. Loaded sag of about 0.5–1.5 mm still wants a jacket on a multi-up sheet, tin or platinum — another reason tin-as-savings is a false economy when you still pay for a mother mold.

Colorant in the *tool* is a different RFQ from color in the chocolate. We would not pigment a chocolate cavity as a shortcut to a tinted bar. Bleed into fat is how you invent a complaint that looks like "not food-grade" when the compound was fine and the pigment was the mistake.

Mix-up: FDA silicone means the tin kit PDF

21 CFR 177.2600 does not approve a factory and does not approve a cousin grade. A gum-supplier letter is formulation evidence, not a tray extraction. The other mix-up is treating soap-lye tin and chocolate platinum as one "food cabinet." They are not.

What to ask when you're buying a chocolate cavity

• Platinum named, tin refused — written on the RFQ?
• 177.2600 and/or LFGB on this article?
• Temper still required (yes) and cavity dry?
• Jacket for a loaded multi-up sheet?
• After CAD lock, 3–7 business days, then MOQ 20 / design?

Related: food-grade molds, contact.

RFQ copy-pack — chocolate, platinum only

Paste into [email protected]:

Object: platinum chocolate RTV cavity (tin not accepted) Dump: bar / shell / bomb, target grams, peak °C Docs: 177.2600 and/or LFGB on this article Structure: open-back + jacket / split / core File: STEP / STL / photos with a millimetre scale CAD: mold-ready STEP OR USD $50 3D if that scope applies Prototype 3–7 business days after CAD lock, then MOQ 20 per design

Send platinum and the doc pack, not a tin kit card. We will not quote tin under chocolate — not a blank free quote. Phone +86 135 3006 2969. Licheng Technology Industry Park, Xinhe Blvd, Shajing, Bao'an. Shop since 2018.

FAQ

Why won't you make my chocolate mold in tin-cure? Leftover odor, ongoing shrink, and a document path that does not match couverture. We quote platinum.

My tin trays already work in the kitchen. Can you copy them? We can copy geometry in platinum. We will not recast chocolate in tin.

Is platinum slower to pour? Inhibition is the tax. Slug and seal the master. That is still faster than a tasting-room recall story.

Does 177.2600 approve your factory? No. It is extraction of the finished article. We are not an FDA-approved factory.

Can a craft tin mold be "washed into" chocolate use? We would not. Recast food in platinum. MOQ 20 per design still applies.