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Diameter size specification:90mmThe110mmThe125mmThe150mmThe180mmPhosphorus free filter paper is a necessary product for soil analysis and filtration produced by our unit through special processing, strictly in accordance with the industry standards of the Ministry of Agriculture（NY/T1121-2006）According to relevant regulations, it is carefully washed out using advanced technology,The product weighs in grams per square meter85g/m²The biggest feature is the absence of phosphorus.

Filtering speed：22s(Medium speed)
thickness：0.20mm
diameter：110mm/90mm/125/150mm
ash content：0.15%
Tensile strength:77-79KN/m
Whiteness:98%
Filtration accuracy0.5-0.65μm
水分：0.1%
Weight:82g/m²

In experiments, filter paper is often used in conjunction with instruments such as filter funnels and Brinell funnels. Before use, the filter paper needs to be folded into a suitable shape. The common folding method is to fold the filter paper into a flower like shape. Folding of filter paperstackThe higher the degree, the higher the surface area that can be provided, and the better the filtering effect, but be careful not to fold too muchstackAnd it caused the filter paper to break. Place the drainage glass rod on multiple layers of filter paper with even force to avoid damaging the filter paper.

1. Fold the filter paper in half continuouslyfoldTwice, stacked together90°Central angular shape.

2Fold the stacked filter paper into three layers on one side and open the other layer to form a funnel shape.
3Put the funnel-shaped filter paper into the funnel, with the edge of the filter paper lower than the edge of the funnel. Pour some clean water into the funnel mouth to make the soaked filter paper stick to the inner wall of the funnel, and then pour out the remaining clean water for later use.
4Place the funnel with filter paper on the filtering funnel holder (such as the circular ring on the iron frame), place the beaker or test tube for receiving the filtered liquid under the funnel neck, and make the tip of the funnel neck rest on the wall of the receiving container.
5When injecting the liquid to be filtered into the funnel, hold the beaker with your right hand and the glass rod with your left hand. The lower end of the glass rod should be close to the lower surface of the three layers of the funnel, so that the cup mouth is tightly attached to the glass rod. Wait for the filtered liquid to flow out along the cup mouth, then tilt along the glass rod and flow into the funnel. The liquid level in the funnel should not exceed the height of the filter paper in the funnel.
6When the liquid passes through the filter paper and flows down along the neck of the funnel, it is necessary to check whether the liquid flows downstream along the cup wall and reaches the bottom of the cup. Otherwise, the beaker should be moved or the funnel should be rotated so that the tip of the funnel is firmly attached to the beaker wall, which can make the liquid flow along the beaker walldownThat's it.

ifIf the product quality is not up to standard, we will provide a full refund or exchange it for a qualified product, and our company will bear the shipping cost.