Janlaugh Alcohol Resistant Laboratory Markers 10 Pack - Dual Head Pens

In this review the Janlaugh 10 Pack Alcohol Resistant Laboratory Markers is presented as a practical choice for lab, industrial and clinical work where markings must survive harsh solvents and extreme cold. The set is aimed at professionals who need reliable, long-lasting labels on tubes, glassware and storage bags; the single biggest reason to buy is the ink's resistance to common lab solvents and temperatures down to -80C, which keeps handwriting legible through typical workflows. The dual ended design also makes it easy to switch between fine and broader marks without changing tools.

Key Features

• Alcohol resistant ink: With high resistance to ethanol and isopropyl alcohol, the ink maintains clear reading after solvent exposure so markings remain usable during routine cleaning or processing.
• Dual ended tips: The double ended pen offers a 0.5mm fine point and a 1.0mm marker tip, allowing precise labeling on small tubes and bolder marks on storage bags without changing pens.
• Extreme temperature tolerance: Marks remain legible in low temperature environments down to -80C/-112F, making these pens suitable for freezer storage and cryogenic handling.
• Broad chemical resistance: The ink withstands DMSO, acetonitrile, bleach, peroxide and detergents, which helps preserve labels through many laboratory processes.
• Multi-surface use: Designed for glass, plastic centrifuge tubes, petri dishes and freezing tubes, the pens deliver durable, long term markings across common lab containers.
• Practical color set: Ten pens in three colors (6 black, 2 red, 2 blue) let users organize and color-code samples for faster identification.

Who It's For

The Janlaugh marker set is best for laboratory technicians, researchers and clinical staff who regularly label vials, tubes and plates and need markings that survive solvent washes, autoclaving and freezer storage. It is also useful in industrial settings where exposure to cleaning agents or occasional oven or incubator use is expected.

Users who require archival, fade-proof ink for legal documents or outdoor signage should look elsewhere; these pens are formulated for laboratory containers and solvent resistance rather than UV or long-term outdoor weatherproofing.

Pros & Cons

Pros

• Good chemical tolerance keeps labels readable after exposure to common lab solvents.
• Dual tips provide flexibility for both fine and bold writing tasks in one pen.
• Works reliably at very low temperatures, down to -80C, for freezer and cryogenic use.
• Supplied in a practical mix of colors and quantities for organization and long use.

Cons

• Ink requires drying time before handling to avoid smudging, which may slow some workflows.
• Not specifically marketed for long-term outdoor UV exposure or archival paper permanence.

Specifications

Brand	Janlaugh
Pack quantity	10 pens (6 black, 2 red, 2 blue)
Tip sizes	0.5mm fine point and 1.0mm marker tip
Chemical resistance	Withstands ethanol, isopropyl alcohol, DMSO, acetonitrile, bleach, peroxide
Temperature tolerance	Operable and legible to -80C / -112F
Intended surfaces	Glass, plastics, centrifuge tubes, freezing tubes, petri dishes, storage bags

Our Verdict

The Janlaugh 10 Pack is a sensible value for labs that need solvent-resistant, freezer-safe markings and the convenience of dual tips. For routine lab labeling and sample organization it delivers durable performance and useful color options, but users should allow ink to dry and not expect outdoor UV-proof permanence. Overall it is a practical, cost-effective option for bench and freezer work.

Frequently Asked Questions

Are these markers safe for freezer and cryogenic storage?
Yes, the ink remains legible at low temperatures down to -80C, so they are suitable for freezer and cryogenic sample labeling.

Do the markings resist common lab solvents?
Yes, the ink is designed to withstand ethanol, isopropyl alcohol, DMSO and acetonitrile as well as cleaners like bleach and peroxide.

Can I use both tips interchangeably during one session?
Yes, the double ended design provides a 0.5mm fine tip and a 1.0mm marker tip in the same pen for quick switching between fine and bold marks.