Re: PF29 oil filter
The lettering on white PF29 and PF25 oil filters was done by a silk-screening process. The quality of this process was affected by the number of cycles a particular silk-screen had produced, the amount of ink in the reservoir, and the machine set-up such as squeegee pressure, alignment, etc. As a result, wide variation in the result is normal for this process. When a new silk-screen was installed and the proper set-up was made, the printing was usually sharp and consistent. As the silk-screen became worn and machine set-up drifted, the printing would become "fuzzy". It was also known by the operators if the oil filters were going into individual resale boxes or being shipped in bulk to assembly plants. This may have also affected visual standards since it doesn't affect filter performance.
In summary, as a judge, I would tend to accept a rather wide variation in printing quality as "typical factory production". However, any variation in printing fonts , orientation or wording( such as bilingual) would be an indication of a reproduction or perhaps a fraudelant copy.
However, we must keep in perspective that this level of detail is only important to the purists who want to "get it right" and preserve the historical significance. The originality points involved would rarely, if ever, result in falling short of an NCRS award.
The lettering on white PF29 and PF25 oil filters was done by a silk-screening process. The quality of this process was affected by the number of cycles a particular silk-screen had produced, the amount of ink in the reservoir, and the machine set-up such as squeegee pressure, alignment, etc. As a result, wide variation in the result is normal for this process. When a new silk-screen was installed and the proper set-up was made, the printing was usually sharp and consistent. As the silk-screen became worn and machine set-up drifted, the printing would become "fuzzy". It was also known by the operators if the oil filters were going into individual resale boxes or being shipped in bulk to assembly plants. This may have also affected visual standards since it doesn't affect filter performance.
In summary, as a judge, I would tend to accept a rather wide variation in printing quality as "typical factory production". However, any variation in printing fonts , orientation or wording( such as bilingual) would be an indication of a reproduction or perhaps a fraudelant copy.
However, we must keep in perspective that this level of detail is only important to the purists who want to "get it right" and preserve the historical significance. The originality points involved would rarely, if ever, result in falling short of an NCRS award.
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