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我们已经指出，制造标石的最好材料是塑料，因为它在任何地下水中绝对不受侵蚀。但是，由于其他的缺点，目前尚不能广泛地应用于测量作业中。同时，近年来我国工业已经生产一系列由各种合成树脂溶液制成的，耐久性极好的油漆涂料。如果考虑到目前广泛用沥青作为隔绝侵蚀水的绝缘材料，在含盐量大于0.5％的水中其耐久性通常不超出6—8年，那末上述油漆涂料将更适合于作为标石的绝缘材料。
We have already pointed out that the best material for making a mark is plastic, because it is absolutely free from any groundwater. However, due to other shortcomings, it is currently not widely used in measurement operations. At the same time, in recent years, our country’s industry has produced a series of paints made from various synthetic resin solutions with excellent durability. If it is considered that asphalt is widely used as insulation material for isolating erosion water, its durability in water with a salt content of more than 0.5% does not generally exceed 6-8 years, then the above-mentioned paint coating will be more suitable as an insulating material for the target stone.