Significato e uso

3.1 Il deterioramento della vernice nei contenitori è solitamente associato all'uso di materie prime contaminate, acqua (especially recycled washing water), containers, pipes and equipment in manufacturing plants. A simple method is needed to determine the presence or absence of microorganisms in plants that make paints and coatings. Such determination allows manufacturers to identify contamination points (cioè., raw materials or problem management areas in the plant) to help address corruption.

Nota 1: Some contamination of plant areas is expected, as microorganisms are ubiquitous and in practice usually cannot be eliminated (this is what the preservatives in the tank should control). Excessive contamination or contamination of raw materials may exceed the capacity of the preservative. If your plant has excessive contamination, there are disinfection methods including steam, preservatives, candeggina, eccetera. These should be discussed with your fungicide supplier and used with care. Recycling spoiled or contaminated products is often not feasible, so the importance of proper fungicide levels combined with good plant management practices is self-evident. Your biocide supplier can also help here.

3.2 This test method can be used by people without basic microbiological training, but some training in aseptic techniques is recommended.

Nota 2: The reliability of the results obtained from this test method depends greatly on the technique used. Incorrect techniques can result in sterile samples being contaminated, or worse, contaminated samples appearing sterile (Vedere 5.1). It is recommended that you consult your biocide supplier, raw material supplier or independent testing laboratory to confirm suspicious results.

ASTM D5588-1997 Metodo di prova standard per la determinazione delle condizioni microbiche nelle vernici, Verniciare le materie prime, e aree vegetali

Fare un passo 1: Scopo

1.1 This test method includes procedures for determining the microbial status (contaminated or sterile) of raw materials used in paint production and the microbial status of paint and paint manufacturing areas.

1.2 I valori espressi in unità SI sono considerati standard. I valori indicati tra parentesi sono solo di riferimento.

1.3 Questo standard non è destinato ad affrontare tutti i problemi di sicurezza, se presente, legati al suo utilizzo. È responsabilità degli utenti di questo standard stabilire adeguate pratiche di sicurezza e salute e determinare l'applicabilità delle restrizioni normative prima dell'uso.

1.4 Questo standard internazionale si basa su principi di standardizzazione riconosciuti a livello internazionale stabiliti nel “Decisione sui principi per lo sviluppo di standard internazionali, Linee guida e raccomandazioni” emesso dal Comitato sugli ostacoli tecnici agli scambi (TBT) dell'Organizzazione Mondiale del Commercio.