Identify a quality diatom mud, see the proportion of the lighter the better. The proportion of light is superior than the major diatom mud diatom mud. 2. To increase the proportion of water while watching reconcile water, the ratio is close to 1: 1 the best; from a practical point of view, if the rate of water is less than 0.5, it indicates a very low content of diatomaceous earth. 3, with a watering can or spray water directly to the model, the more absorbent the faster, the better description of diatom mud respiratory function, and respiratory function is the most basic function of diatom mud; there is a very simple method of operation; that is, Girls commonly used perfume bottles on a clean irrigation water, repeatedly sprayed on the diatom mud model, attention is repeatedly sprayed in the same place a model, if you can quickly absorb water to demonstrate their respiratory function. There are also times how much water can be used to roughly determine the strength of the diatom mud respiratory function, the general quality of diatom mud is more than thirty times. If little water absorption, indicating low levels of diatomite or diatomaceous earth pores are clogged, its poor respiratory function diatom mud. After the spray or pour, hand to touch, poor diatom mud, will be out powder or fade. After the water dry, poor diatom mud will leave marks or fade. 4, with a flamethrower against diatom mud diatom mud quality model Spitfire can fire retardant, thermal insulation material is resistant 1000 ℃ degree heat. In case of fire, flame, no smoke, no smell. 5, observe the diatom mud diatom mud surface quality soft touch, such as feeling like pine. Poor diatom mud feel stiff, like cement and sandstone facades. 6, observed diatom mud surface texture effects of diatom mud to facilitate the construction of high quality, plasticity, texture and feel very soft. Poor turn diatom mud construction prone skin, loss, uneven color, texture and feel stiff.