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Cobalt-Free 8% One-Spot Humidity Indicator Paper Card, Brown to Azure, 30 × 50 mm
Humidity Indicator Cards

Cobalt-Free 8% One-Spot Humidity Indicator Paper | RFQ Sourcing Details

Humidity Indicator Cards · Quote on request

This is a product procurement detail page: check specs, images, category context and related sourcing paths before sending an RFQ.

Quote on request

Product specs

CategoryHumidity Indicator Cards
Unitset
MaterialPaper
Card size30 × 50 mm
Carton size55 × 54.5 × 14 cm
Product typeOne-spot humidity indicator paper card
CustomizationAvailable
Color responseBrown when dry;turns azure when moist
CategoryHumidity Indicator Cards
AvailabilityInquiry required
Source date2026-07-24

Buyer's Digest

Use this page as a product-first sourcing checkpoint before sending an RFQ. Category: Humidity Indicator Cards. Confirm application fit, capacity, materials, destination, lead time and compliance requirements before comparing suppliers.

Original product description

This one-spot humidity indicator card provides a simple visual check of humidity conditions inside moisture-control packaging. Its 8% indicator is specified to appear brown when dry and turn azure when exposed to moisture. The card is made from paper and is stated to contain neither cobalt nor halogen.

The listed specification is 30 × 50 mm. Packing is stated as 50 cards per vacuum pack, 10 vacuum packs per tin, and 20 tins per carton, totaling 10,000 cards per carton. The listed carton size is 55 × 54.5 × 14 cm, with a gross carton weight of 7 kg.

Minimum order quantity is stated as 10,000 pieces, with a listed lead time of 10 days and production capacity of 300,000 pieces per day. Customization is available. The card is intended for humidity indication in barrier packaging used with sensitive electronic components.

It may be placed inside a sealed moisture-barrier or vacuum package together with an appropria tly on top of it, minimizing component exposure before packaging, and heat-sealing the package according to the bag manufacturer's recommendations.

Procurement teams should confirm that the offered batch has the required 8% response point, brown-to-azure color transition, 30 × 50 mm format, and cobalt- and halogen-free formulation.

Buyers should also request the applicable MSDS, REACH, and RoHS documentation and verify its scope, revision, and relationship to the exact product supplied.

Confirm the cited J-STD-033 designation, required test method, shelf life, storage conditions, packaging configuration, customization details, inspection criteria, and final shipping terms before ordering.

Cobalt-Free | Applications and Buyer Notes

Cobalt-Free is organized as a sourcing-ready Humidity Indicator Cards reference. The page combines visible product or company data with structured procurement cues so buyers can compare application fit, specifications, quantity, quality requirements and lead-t

Applications

  • Initial shortlist building for related product or supplier options.
  • Specification and application fit review before bulk purchasing.
  • Category, keyword and detail-page comparison before sending an RFQ.

Key specifications

Category
Humidity Indicator CardsBased on visible page data; confirm exact value in the RFQ.
Unit
setBased on visible page data; confirm exact value in the RFQ.
Material
PaperBased on visible page data; confirm exact value in the RFQ.
Card size
30 × 50 mmBased on visible page data; confirm exact value in the RFQ.
Carton size
55 × 54.5 × 14 cmBased on visible page data; confirm exact value in the RFQ.
Product type
One-spot humidity indicator paper cardBased on visible page data; confirm exact value in the RFQ.
Customization
AvailableBased on visible page data; confirm exact value in the RFQ.
Color response
Brown when dry;turns azure when moistBased on visible page data; confirm exact value in the RFQ.

Buyer tips

  • State quantity range and split-delivery needs before price comparison.
  • Add certification, material or inspection standards when they affect acceptance.
  • For time-sensitive projects, include target arrival date and destination.
  • For special applications, describe operating condition, installation environment and duty cycle.

FAQ

What should buyers confirm first?

Confirm application, specification, quantity, destination and lead-time requirements before comparing offers.

Can buyers inquire when specs are incomplete?

Yes. Add model, material, size, use case and inspection needs in the RFQ to make replies comparable.

How should this listing be evaluated?

Check title, category, specifications and related keywords against the actual sourcing requirement.

Source mix: ugc

Key specifications

CategoryHumidity Indicator Cards
Unitset
MaterialPaper
Card size30 × 50 mm
Carton size55 × 54.5 × 14 cm
Product typeOne-spot humidity indicator paper card
CustomizationAvailable
Color responseBrown when dry;turns azure when moist
Listed standardJ-STD-033
Packing per tin50 pieces per vacuum pack × 10 packs per tin
Listed lead time10 days
Packing per carton10,000 pieces;20 tins per carton
Gross carton weight7 kg
Transport packagingCartons and pallets
Listed documentationMSDS, REACH, and RoHS
Minimum order quantity10,000 pieces
Humidity indication point8%
Listed production capacity300,000 pieces per day

Product sourcing keywords

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