Product Designs — PURALUM Demo

Source of Truth

The approved canonical design

One design. Every image, render, prototype and manufacturer brief must match this spec exactly. Any deviation requires updating this document first.

Schematic only — not to scale. Pending 3D CAD render.

✓ Approved Canonical Design

Dual-Surface Crystal Applicator

Palm-sized refillable potassium alum applicator with two distinct crystal surfaces and a shared reusable silicone housing.

✓ Softly rounded vertical capsule, ~100mm × 50mm

✓ Matte warm-ivory silicone central grip

✓ Side A: flat oval alum crystal surface (face)

✓ Side B: convex oval alum crystal surface (underarm)

✓ Separate ventilated snap-on cap per side

✓ Face/body symbols moulded into housing

✓ Forest-green PURALUM wordmark on grip

✓ Double-ended refill cartridge (quarter-turn unlock)

? Crystal: compressed ground alum vs grown crystal (TBC)

? Estimated weight with refill: ~90–110g (TBC)

Physical Specification
Product name	PURALUM Dual-Surface Crystal Applicator
Height	~100mm (pending CAD)
Width	~50mm (pending CAD)
Active ingredient	Potassium alum (KAl(SO₄)₂·12H₂O)
Housing material	Food-grade silicone over PP core
Cap material	PP with ventilation slots
Crystal appearance	Dense translucent milky-white mineral
Refill mechanism	Quarter-turn bayonet unlock
Wordmark colour	Forest green #1B3A2D
Housing colour	Warm ivory #F6F2E9

Design History

Concepts explored

These are the AI-generated images from V1 and V2. They depict multiple incompatible product designs — the core problem V3 fixes. Each is documented here with its status and why it was rejected.

◆ Closest to spec

Rounded Capsule

Rounded white form on marble is closest to the canonical shape. Gold band and dual-ended suggestion visible. Still not exact — crystal surface, caps and symbols not correctly shown.

✗ Rejected

Jade Roller Lifestyle

Product visible appears to be a different brand's jade roller — wrong form factor, wrong material, wrong mechanism. Cannot use on customer-facing pages.

◆ Usable concept

Underarm Lifestyle

Application pose and body positioning are correct. Different brand name visible on product. Can be reshot with canonical product reference once confirmed.

○ Style reference

Flat Lay Styling

Sage, eucalyptus, stone surface and natural styling are on-brand. Prop composition is usable as a style reference. Product itself needs replacing with canonical design.

✓ Accurate

Raw Alum Crystal

This image is accurate — potassium alum crystals in macro. Correct mineral reference. Usable in education and ingredient sections. Keep for V3.

○ Style reference

Packaging Concept

Kraft + forest green packaging direction is correct. The product inside does not match canonical spec. Packaging concept is valid for manufacturer brief. Product must be replaced.

◆ Concept valid

Before/After Concept

Split composition comparing cluttered deodorants vs single PURALUM is a strong ad concept. Right-side product still shows wrong design. Needs canonical product once confirmed.

○ Colour reference

Forest Green Ad

Dark forest green background + glowing product is the right ad creative direction. Product form is a tall cylindrical bottle — rejected. Background colour and mood are correct.

Dual-Surface Design

Side A and Side B

The central design principle: two purpose-built crystal surfaces on one refillable housing. Every image must show them correctly labelled and distinct.

A

Side A — Face Surface

Flat Oval Crystal

Flat oval crystal surface designed for precise broad-stroke application across the cheek, forehead, jawline and neck. Controlled, even mineral contact with minimal pressure required.

Shape: flat oval, smooth

Contact area: ~40 × 28mm

Symbol: face icon (moulded)

Cap: ventilated snap-on (Side A only)

Use: face, neck, post-shave (patch test first)

Order of use: face side first, body side second

B

Side B — Body Surface

Convex Oval Crystal

Gently convex oval crystal surface shaped to follow the natural curve of the underarm. Designed for even mineral contact across the entire underarm without gaps or missed areas.

Shape: convex oval, smooth dome

Contact area: ~40 × 28mm

Symbol: body icon (moulded)

Cap: ventilated snap-on (Side B only)

Use: underarms only

Caps: never interchangeable between sides

Hygiene Design

Care instructions

The most common customer objection: "You use the same product on your face and underarms?" V3 must answer this immediately with clear hygiene instructions and physical design evidence.

💧

Step 1

Wet the surface

Hold crystal surface under water or dampen with a few drops. Water activates the mineral for smooth application.

✋

Step 2

Apply

Glide Side A on face first. Glide Side B on underarms. Light strokes only — never heavy pressure.

🚿

Step 3

Rinse both surfaces

Rinse each crystal surface under water after use. Both sides. Non-porous mineral — water rinse is sufficient.

🌬️

Step 4

Let dry completely

Allow both surfaces to air dry fully. Ventilated drying tray recommended. Do not cap wet surfaces.

🔒

Step 5

Cap only when dry

Ventilated caps go back on only after crystal surfaces are completely dry. Caps physically isolate the two surfaces.

Physical separation features

✓ Separate cap per side — cannot swap
✓ Ventilated caps prevent moisture buildup
✓ Non-porous mineral crystal — no bacteria absorption
✓ Face/body symbols prevent user confusion
✓ Drainage channel at crystal seat (pending engineering)

What to tell customers

"Use Side A on face first. Rinse. Use Side B on underarms. Rinse both. Let air dry fully before capping. The mineral surface is non-porous — it does not retain bacteria between uses."

Prototype Roadmap

Path to physical product

No paid ads until Phase 4. No inventory until Phase 5. Full detail in docs/prototype-roadmap.md

Phase 0

Now · 1–2 weeks

Design Lock

~$300–800

✓ Canonical product spec written

✓ Demo website and campaign brief

○ Commission 3D render / CAD from product designer

○ Approve master render as image generation reference

○ Confirm product name pending mechanism review

Phase 1

Weeks 3–4

3D Print Prototype

~$150–400

○ Convert CAD to STL for SLA resin print

○ Cast dummy crystal inserts (resin, milky-white)

○ Test ergonomics — grip size, surface reach, cap click

○ Photograph real prototype (replaces AI images)

Phase 2

Weeks 6–10

Crystal Compression Test

~$200–600

○ Test: ground alum + compressed vs grown crystal vs CNC cut

○ Validate flat + convex surface finish achievable

○ Drop test — can crystal withstand 30cm fall?

○ Wet/dry cycling — no cracking after 90 days daily use

Phase 3

Weeks 10–20

Manufacturer RFQ

Tooling TBD

○ Housing: silicone over-mould injection tooling quote

○ Crystal refill: specialist alum manufacturer quote

○ Packaging: kraft box + forest-green interior quote

○ MOQ, lead time, sample timeline

Phase 4

Weeks 22–28

Beta Units — 10–30 units

~$500–2,000

○ Assemble from prototype housing + crystal

○ Send to 10–30 USA + AU testers

○ Collect structured feedback — hygiene, odour, ergonomics

○ Photograph real product → replace all AI images on site

○ Collect tester consent and genuine written feedback

Phase 5

Month 9–10

Pre-Launch Inventory

COGS TBD

○ First production order (500 units minimum)

○ Confirm 3PL fulfilment (USA + AU)

○ Calculate real COGS → confirm $27.99 price holds

○ Real returns policy, real shipping rates, real delivery estimates

○ First paid ads only after break-even CPA is calculated

Engineering Questions

What we don't know yet

These are the open questions that must be answered before manufacturing. They affect product design, claims, pricing, and regulatory classification.

🔴

Crystal moulding method: Can potassium alum be compressed or grown into the dual flat+convex shape with sufficient structural integrity? Or does it need to be CNC machined from a block?

🔴

Refill mechanism: Does the quarter-turn bayonet unlock work reliably with alum crystal? What keeps the cartridge sealed against water ingress during use?

🔴

Drop durability: Natural alum crystal can crack. What happens if the product is dropped on a hard bathroom floor? Can we design a protective housing that absorbs impact?

🔴

Hygiene isolation: Are the two caps physically sufficient to prevent cross-contamination when stored? Does the ventilation design prevent mould in humid environments?

🟡

Crystal lifespan: How many applications before the crystal surface is fully consumed? This determines the refill cycle and whether the $14.99 refill price is viable.

🟡

Weight distribution: With two crystal ends, does the product stand upright unsupported on a bathroom counter? Or does it tip? Affects packaging insert and user experience.

🟡

Silicone compatibility: Is food-grade silicone sufficiently durable for daily wet/dry cycling over 12+ months? Does it discolour or degrade with daily mineral contact?

🟡

Regulatory classification: Does the combination of face and underarm deodorant use — with any substantiated benefit claims — push the product into therapeutic territory in AU or USA?

Read full prototype roadmap → docs/prototype-roadmap.md

PURALUMProduct Designs