A Colored Protective Case costs twice a tote. Is it worth it?

Per trip it is cheaper, 0.6 against 0.9, if the case turns ten times a year. One that never moves is dear at any price.

Metal is stronger, so why switch?

Strong means stiff, not corrosion-proof. After 96 hours of salt fog the steel rusts first; the moulded body needs a wipe.

Above what size should the case be dropped?

1200 mm on the longest side. Past that, mould and unit cost rise together.

Can a Colored Protective Case replace a crate for export?

Yes, and it removes ISPM 15 fumigation and marking, if the rule covers timber only.

Six Cases on One Shelf: When a Colored Protective Case Loses

Quick answer: A Colored Protective Case is not the cheapest answer everywhere. Weigh four numbers on one scale, tare, wall, cycles, cost per trip, and three jobs fall out of the tender: one-way freight, any side past 1200 mm, and heat that softens polypropylene.

Four Measures for Six Cases on One Shelf
Against a Thin-Wall Tote: 1.6 kg Lost to 2.8 mm
Against a Metal Case: The Salt Fog Ledger
Against a Soft Bag: Foam Thickness and Set
Against a Wooden Crate: 60 Trips and Cost per Trip
Three Exit Lines: Work That Belongs Elsewhere
FAQ

1. Four Measures for Six Cases on One Shelf

A Colored Protective Case rarely reaches a price table because it is cheap; it carries mould cost and masterbatch metering. It appears because the old packaging failed: a rusted corner, a slumped carton, a strap cut into a bag.

Four measures keep it honest: tare, side wall, cycles, cost per trip. Weight sets units per trip, wall the puncture floor, cycles the life, and cost per trip divides price by cycles to land every band on one scale.

Measure	Colored Protective Case	Thin-wall tote	Metal case	Wooden crate
Tare	4.2 kg	2.1 kg	6.8 kg	9.5 kg
Side wall	2.8 mm	1.6 mm	1.0 mm steel	15 mm board
Cycles	300	80	120	6
Cost per trip	0.6	0.9	2.4	8.0

2. Against a Thin-Wall Tote: 1.6 kg Lost to 2.8 mm

The tote wins on weight: 2.1 kg against 4.2 kg at the same length, two more units per trip.

Colored Protective Case: close view of a blue lid corner, one wide red latch clamped on the rim, three short ribs on the side wall

The saving is paid in the wall. At 1.6 mm an 8 kg weight from 0.8 m whitens the bottom corners and splits them on the second hit; at 2.8 mm the same drop leaves one shallow mark. A tote assumes the load supports itself, a Colored Protective Case that it takes the blow.

Under four moves a day, two tiers, indoors, a tote is enough; onto a tail lift, five tiers high, the wall earns its 2.1 kg.

3. Against a Metal Case: The Salt Fog Ledger

Stiffness is the steel argument; surface is the steel problem. At 96 hours in salt fog the galvanised edges bloom white while the moulded body carries a film of water. The gap shows in the third rainy season, not day one.

Tare: 6.8 kg against 4.2 kg, and empty-case fatigue lands by mid-afternoon.
Salt fog: zinc whitens at 96 hours, the moulded body is accepted at 480.
Dents: steel needs a hammer and paint, through-colour plastic keeps its shade.
Static and noise: steel needs an earth bond and rings on a night dock; polypropylene does neither.
Heat: steel holds past 200 C, the body softens at 100 C.

That last line is the exit: drying lines and washdown belong to metal.

4. Against a Soft Bag: Foam Thickness and Set

A bag is cheap, folds flat and returns almost free of volume. The real comparison is foam thickness and how much of it comes back.

Colored Protective Case: close view of a blue side wall, a long toothed latch bridging the lid seam, three angled ribs above it

Item	Colored Protective Case	Soft bag
Cushion	20 mm die-cut foam, separate cavities	8 mm pearl foam, one sheet
Set after 200 handlings	6 percent	22 percent
Puncture	carried by the wall	carried by fabric, a tear runs
Stacking	5 tiers	2 tiers

Past 20 percent set the bag still looks serviceable while the load has gone loose: no visible damage, no cushion. A moulded insert is cut to one cavity; a new shape needs a new insert.

5. Against a Wooden Crate: 60 Trips and Cost per Trip

A crate carries about 8 per trip because it is counted over 6 cycles. A Colored Protective Case spreads 180 over 300 cycles to 0.6; the gap sits in how often it comes back.

On freight that never returns, cycles equal one and the arithmetic flips: 180 against a single trip. That is the commonest packaging error.

Past 1200 mm the crate takes over: mould cost follows projected area, and a cavity that large needs a big press.

Timber also carries an export gate: ISPM 15 treatment, a mark, a waiting period. Plastic avoids all three.

6. Three Exit Lines: Work That Belongs Elsewhere

One-way freight, return rate under 30 percent: buy single-trip packaging.
Any side past 1200 mm: mould and unit cost climb together; buy a frame.
Above 100 C, or a drying tunnel: buy metal.

A quiet fourth: dimensions that change monthly. Half the value of a Colored Protective Case sits in the insert.

Conclusion

Four numbers stack the advantage: a 4.2 kg tare, a 2.8 mm wall, 300 cycles, 0.6 per trip. Where it loses is as plain: one-way freight, oversize bodies, hot processes. Remove those three and the rest is the share a Colored Protective Case wins.

This article discusses only the container (case body) side of specifications and design intent, and does not cover any handling, loading or use of the contents.