Monitors effective penetration of steam and heat over time into thick packs.
Dramatic color change from yellow to blue-purple when full parameters are met.
Indicator Ink and Testing Parameters: Complete color change from yellow to blue-purple will occur in the presence of steam at a minimum of 250° F (121° C) for a minimum of 15 minutes. Failure to achieve the minimum conditions will result in no color change (yellow) or intermediate color change on strip to brown or green.
Dimensions: 5-5/8” x 7/8”
Shelf Life: Expiration marked on end flap of package, 18 months from date of manufacture.