So far I think that we can all agree that using graphite to view a grill is very convenient and effective. The issue of contention seems to be that adding graphite could be seen as a permanent modification and contrary to our role as conservators of philatelic material.
Not erasing the graphite is a good point. This introduces no physical damage to a grill. However, it leaves the foreign material, graphite, and obscures the actual appearance of a grill.
The comparison of hinging an original gum stamp to adding graphite to view the grill of a stamp is interesting. Hinging alters the gum while utilizing graphite adds a foreign substance. Aside from devaluing a stamp, I can see the appeal of hinging a MNH stamp. There is nothing to obscure the face of the stamp when doing so. A grilled stamp does have a visual distinction from the front, but the rear is where a grill is typically observed. By placing graphite on it, it no longer looks as it originally appeared. A hinged MNH stamp doesn't have this problem unless you care about the appearance of the reverse. Even then, things such as gum breakers can be identified in the presence of gum disturbed by a hinge.
If one ever contemplates removing the graphite from the back of a stamp, especially if a grill is present, then you must use a soft eraser as Bill Weiss noted. Use a blotting motion instead of a dragging motion. Search Youtube if you are unfamiliar with methods. Also, never use graphite on the face of a stamp to identify a grill, such as when a stamp is on cover. In the vast majority of cases cheap (i.e. thin) aluminum foil or gold/silver/copper leaf can be obtained from an arts and crafts store that can be utilized to visualize a grill. Place the material over stamp, gently rub the material with something like a cotton swab, then place that material far away from the stamp. Use something like Cyanoacrylate (super glue) to make the impression on you material to be rigid. At that point you have an accurate reproduction of the grill of your stamp and can use any method that you like to highlight the rows and columns.
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If you think that there are a lot of fake grills now, just wait until the time if this ever happens.
This argument appears to me as a "slippery slope" fallacy. I imagine that a similar situation arose upon distinguishing Mint Never Hinged stamps as being more valuable. It just isn't an argument that is relevant and appeals to fearmongering.
I haven't encountered a collector more studied in grills than essayk on this forum. Many arguments state that applying graphite doesn't devalue a stamp. However, the only data we have of a collector that specifically collects grills says that he'll pay more for non-graphite adulterated stamps. Until we hear from other grill collectors saying anything contrary, we should accept essayk's viewpoint as de facto.
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My opinion: Collectors should be good paper conservators, and practice good paper conservation techniques at all times. If they do not, then they are causing harm to the material and expect others to bear with it. There is a price for that. But aside from price, the hobby loses some of its panache when we tolerate practices which adulterate the material entrusted to our care.
I agree with this. Simply put, I agree that collectors shouldn't alter stamps in any manner. What constitutes alteration is up for debate. However, I believe that applying graphite should not be done.
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As an expertizer, I can tell you emphatically, that without rubbing some graphite on some very faint grills, there is no way I can either identify them positively *or* study them well enough to decide if it is a fake grill.
I can somewhat agree with this argument if it was made such that graphite is quick and easy compared to other less convenient methods of identifying a grill. Other methods are available, but the addition of graphite is non-reversible and the reverse of a stamp is disfigured by it.
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Further, if we disapprove of anything that "adulterate the material" then we certainly would have to strongly object to the use of a stamp hinge to mount a mint stamp, yet a lot of collectors still use hinges to mount mint stamps. Many using the argument "I don't collect gum, I collect stamps". So what are we to do about those folks?
This argument seems to me to be a "red herring" fallacy. It doesn't address the issue at hand. It tries to distract us from it by presenting a separate issue. People that own a stamp can do whatever they like with it. Embed it in a keychain, set it on fire, whatever they do is their prerogative. The actual issue at hand concerns those that take a serious approach to philately. There are many arguments to be made about what a "true philatelist" would do, but I think that we can all agree that conservation of the material is imperative.
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Also, where do we draw the line as to exactly what constitutes "adulteration" of the material?
Great question that focuses on what I feel is the issue at hand. Personally I feel that graphite disfigures a grill from it's original state and is not worth applying for the convenience in identification. That is my viewpoint. I hope that further argumentation centers on this issue.
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With all the pollutants already in the paper from the grill era, a bit of graphite on the back is nothing to worry about.
I cannot agree with this argument. It is permanent and it obscures a natural view of the grill. It is very foreign and very different than the "polutants(sic) already in the paper from the grill era."
These are my arguments and viewpoints. I very much look forward to hearing replies. I am not set in my opinion and welcome all arguments.