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3. Brand and Quality Renowned brands tend to have higher price points due to their reputation for quality, durability, and customer support. Investing in a well-known brand may result in fewer maintenance issues and longer machine life, saving money in the long run. However, lesser-known brands may offer more affordable options that could be suitable for less frequent use.
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Film method: take 100g of redispersible polymer powder dissolved in 100ml of water, after 2 minutes of full mixing, stir again, pour the solution on a piece of flat clean glass, glass placed in a ventilated shaded place. After sufficient drying, remove it. Observe the removed polymer film, the higher the transparency, the better the quality. Then pull the film moderately, the better the elasticity, the better the quality. Then cut the film into strips, immersed in water, 1 day later to observe, the less dissolved by water, the better the quality.