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FREQUENTLY ASKED QUESTONS

Q: What is the lowest temperature at which Tough-Tags will perform?

A: Tough-Tags will work at -40°C, provided you are using microcentrifuge tubes made of 100% pure virgin polypropylene. They will work at -20°C regardless of the kind of tube they are on. For anything below -80°C, we suggest Cryo-Babies and Cryo-Tags.

Q: Will Tough-Tags fall off during certain procedures?

A: If tubes labeled with Tough-Tags are placed into a boiling water bath immediately after being removed from cryogenic storage (-80°C), the drastic temperature change will shock the material and labels may fall off. We recommend that the labels be allowed to thaw at room temperature before being placed into a boiling water bath.

Q: Do you recommend any microtubes in particular for Tough-Tags?

A: Tough-Tags will adhere to any container, but they perform best with tubes made of 100% pure virgin polypropylene. Also, it is important that they be applied to tubes that are completely dry. If there is any moisture on the tube, the Tough-Tags may peel or fall off.

Q: What are the advantages of DuraSeal over Parafilm?

A: DuraSeal softens above 100°C (compared to 68°C), resists essentially all solvents, is compatible with solution microwaving, resists breakage, and has no interleaf paper to strip away.

Q: Why do Cryo-Babies and Cryo-Tags not adhere very well to Nunc Cryovials?

A: Cryo-Babies and Cryo-Tags will function with Nunc Cryovials as long as they are applied directly on top of the white writing surface provided on the cryovial.
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Sept/Oct 2017 Catalog