Frequently asked questions
Common questions about labels for chemicals and pharmaceuticals
Answers to the most frequently asked questions before requesting a sample or quote for a project in the chemical or pharmaceutical sector.
Which label is used for hazardous chemical products (GHS)?+
For GHS labelling of hazardous chemical products we use polyester labels with a high-performance adhesive, printed by thermal transfer with resin ribbon. The material must keep the hazard pictograms and warnings legible after exposure to the product, humidity and transport. For containers destined for maritime transit, the combination must meet BS 5609 certification.
Which label withstands liquid nitrogen (−196 °C)?+
Storage in liquid nitrogen at −196 °C requires materials specifically designed for cryogenic conditions: they don't become brittle, don't lose adhesion, and the code stays legible even after repeated immersion and recovery cycles. Standard adhesive fails at these temperatures. Contact us and we will guide you on the right material and adhesive for your specific cryogenic application.
What is BS 5609 certification and when is it mandatory?+
BS 5609 is a standard that certifies the resistance of labels and inks for use on containers of dangerous substances in maritime transit. It's mandatory when the product is classified as dangerous under IMDG regulations and transported by sea. Certification includes immersion testing in artificial sea water for 3 months, UV resistance and abrasion resistance. Section 2 certifies the label material; Section 3, the ink or ribbon.
Do self-adhesive labels stick to laboratory glass and HDPE?+
Laboratory glass is a high-energy surface and takes most permanent acrylic adhesives well. HDPE and PP are low-energy surfaces and require high-performance adhesives or, in some cases, prior surface treatment. For cryogenic HDPE or PP vials, a material that also keeps its adhesion at extreme temperatures is needed.
Can you prepare labels with serialisation and a DataMatrix code for pharma?+
Yes. We supply labels for pharmaceutical traceability with DataMatrix, QR and 1D barcode in the formats and sizes required by each application. The usual material is polyester with resin ribbon to keep the code durable and legible under pharmaceutical conditions of use. Tell us the code quality requirements (ISO grade, reading equipment) and we will guide you correctly.
Can you send a sample before production?+
Yes. In chemicals and pharmaceuticals, where the environment can be especially aggressive and the regulatory requirements very strict, validating the material with a sample before production is essential. Tell us the product, the type of container, the applicable regulation and the process of use, and we will prepare a sample suited to your application.
What guarantees that a label meets BS 5609 for maritime transit?+
BS 5609 requires the full material, adhesive and print combination to pass immersion testing in sea water for 3 months. Only combinations specifically tested under this standard can claim compliance. The materials and ribbons we work with carry manufacturer BS 5609 certification; if you need it for your validation or audit process, we will provide it.