What goes wrong

It evaporated, or it ate the bottle

On this page11

The resin was wrong The resin chart is the first stop The liner was never specified The bottle was too big for the decant Fifty bottles have fifty seals The dropper bulb perished The pigment settled into a plug The light did the rest Test the way it will sit And weigh it References

PET is 430 of 793 containers and the wrong resin for half this group.

The resin was wrong

A lacquer or a solvent thinner in PET softens, clouds or splits the bottle. The archetype says chemical resistance is the entire decision and it is right.

The resin chart is the first stop

Before capacity, before shape, before cost. A resin that fails with the carrier takes everything downstream with it, and the chart answers it in a minute.

The liner was never specified

A cap is a cap and a liner is the barrier. Most evaporation complaints are liner complaints wearing a bottle's name, and the specification simply was not written down.

The bottle was too big for the decant

Half a bottle of air is half a bottle of oxygen and a large evaporation surface. Matching the container to what somebody will finish is a shelf life decision.

Fifty bottles have fifty seals

Splitting a litre multiplies the sealing surface by the number of units. A failure rate that was invisible on one drum is a customer service problem at fifty.

The dropper bulb perished

Elastomer in a solvent. The bulb goes before the bottle does, and the answer for a solvent-borne product is usually a lined cap plus a separate pipette rather than a dropper assembly.

The pigment settled into a plug

A wash that sat for a month needs agitating, not shaking, and that needs headspace and a closure that holds when inverted. A bottle filled to the shoulder cannot be mixed.

The light did the rest

Faded pigment and a changed binder, which is what the archetype's light sensitive flag is about. 143 amber containers on the shelf, against a craft that wants to see the color.

Test the way it will sit

Filled, capped, upright for a month and on its side for a week, warm. Every failure on this page shows up in that test and none of them show up on a bench the day you fill it.

And weigh it

The cheapest evaporation test there is: weigh a filled unit, leave it, weigh it again. A loss you can measure in grams is a product you cannot sell twelve months later.

References

The archetype behind this shelf is ind-chemical: 100 to 20,000 mL, narrow mouth, HDPE and glass, light sensitive, child resistant, poured, with "chemical resistance is the entire decision, check the resin chart first" as its stated reason. All six leaves in this group sit on it. The window is an industrial one and this craft works at 15 and 30 mL, which is why the shelf reads large for the work.

The Davis Pack Supply catalog, measured 18 October 2026. The miniature painting shelf is 1,439 rows: 793 containers and 646 closures. 5 mL to 9,464 mL with a median of 118; 41 containers at 15 mL or under, 115 at 30 mL or under, 228 at 60 or under and 411 at 120 or under. 430 PET, 133 HDPE, 133 glass, 87 PP, 9 steel. 487 bottles, 281 jars, 13 tubs and pails, 9 tins, 2 tubes. 143 amber or dark amber. Closures: 382 continuous thread, 43 dropper assemblies, 32 disc top, 31 child resistant, 27 dome lids, 26 spouted, 19 lug and twist, 17 flip top, 14 phenolic, 13 spice caps.

Written from 15 U.S.C. 1277, 16 CFR 1500.14(b)(8) and 16 CFR 1500.3(c)(6), and from the catalog as it stood on 18 October 2026. Where a requirement turns on a determination the Commission makes rather than on a fixed rule, this property says so. Nothing here is a toxicological review, which is the one thing in this area that cannot be done from a document.