Significato e scopo
4.1 The procedures described in this practice are intended to help evaluate the performance of house and decorative paints on new, previously unpainted wood.

4.2 A causa delle differenze nella radiazione solare, wet time, temperatura, contaminanti, e altri fattori, the relative durability of paint during outdoor exposure may vary considerably depending on the location of the exposure. Perciò, it cannot be assumed that the results of a single exposure at a single location will help determine the relative durability of different locations. Exposure is recommended at multiple sites with different climates that represent a wide range of expected service conditions.

4.2.1 Due to annual climate variability, the results of a single exposure test cannot be used to predict the absolute rate of material degradation. It takes several years of repeated exposure to obtain an “average” test result for a given location.

4.2.2 Solar radiation varies greatly with the time of year. This can lead to large differences in apparent degradation rates for many coatings. It is not recommended to compare results for materials exposed for a short period of time (less than one year) unless the materials were exposed at the same location at the same time.

4.2.3 It is recommended to conduct at least three repeated tests for each material. Based on the parameters of the known material, a statistical estimate of the number of required repetitions can be found in Practice E122.

4.3 The Meaning and Uses section in Practice G7 addresses many of the variables to be considered in external exposure testing.

ASTM D 1006-2021 “Test di esposizione all'esterno per vernice su legno”

Ambito di applicazione
1.1 This practice covers the procedures to be followed for direct exposure of previously unpainted wood and wood composites to house and decorative paints. When the sponsor actual exposure of the aging test is carried out by a separate agency, the specific conditions for testing and controlling the exposure of the specimen should be clearly defined and mutually agreed upon by the parties.

1.2 This standard covers sample preparation, including the application of test coatings to wood substrates.

1.3 I valori espressi in unità SI o pollici-libbre devono essere trattati separatamente come valori standard. I valori specificati in ciascun sistema non sono necessariamente gli stessi; Perciò, per garantire il rispetto degli standard, ciascun sistema dovrebbe essere utilizzato indipendentemente l'uno dall'altro e i valori dei due sistemi non dovrebbero essere combinati.

1.4 Questo standard non è destinato ad affrontare tutti i problemi di sicurezza, se presente, legati al suo utilizzo. È responsabilità dell'utente di questo standard stabilire la sicurezza adeguata, pratiche sanitarie e ambientali e per determinare l'applicabilità delle restrizioni normative prima dell'uso.

1.5 La presente norma internazionale è stata sviluppata in conformità con i principi di standardizzazione riconosciuti a livello internazionale stabiliti nella Decisione sui principi per lo sviluppo di norme internazionali, Linee guida e raccomandazioni emesse dal Comitato sugli ostacoli tecnici al commercio dell'Organizzazione mondiale del commercio.