In the market, many brands of plastic raw material testing instruments have appeared, and the prices vary among different brands. Many people only use price as a standard when purchasing, believing that higher prices indicate better quality. In fact, this is a misguided notion, as some sellers may deliberately sell at high prices.Therefore, we should not only rely on price as a criterion, but also consider other factors. However, we cannot completely ignore price since it is also important. To determine which brand is good in the current market, we must first consider the manufacturer's reputation. A reputable manufacturer indicates that its product quality is guaranteed.In addition to the manufacturer's reputation, we should also look into the sales performance of the plastic raw material testing instruments from that brand. If it sells well in the market, it suggests that many people are purchasing it. This also indicates that its product quality must be good to attract so many buyers. By evaluating these aspects, we can ascertain which company's products are superior.