地板疤结 /木结,What is wood flooring knots, why black mark/filler there?
为什么购买的实木地板有很多疤结？木地板疤结，地板黑点?
一款纯天然的地板，疤结同样是产品的一部分。天然木材疤结必然存在，而生产商会对疤结进行修补，一般根据欧美需要而使用黑褐色来进行填补。
产品用户完全不需要担心修补后的结疤会脱落，经过近百年的使用，几乎没出现过修补后的结疤自行脱落现象。
如果客户对于产品有特殊要求，请务必明确告知供应商不希望有疤结，一个专业地板供应商，往往会有两类产品，一类为正常产品即天然产品，另一类为挑选后的产品。地板行业内称为“PRIME GRADE” 或称为“AB GRADE”。
一定要注意，地板供应商提到的“不是很多”“铺在地上看不出来”等等，这些并不会出现在生产商的合同当中。
“不是很多，铺在地上看不出来”这些词汇只代表，该地板供应商无法供应另一类产品，或者说他的产品与所有地板供应商一样没有任何差异。请注意地板疤结/木结是普遍存在的！
地板的表面等级在生产商中划分为：
AB (PRIME GRADE)
CD (RUSTIC GRADE)
ABCD (NATURAL GRADE)
ABC (MIXED GRADE)
为什么购买的实木地板有很多疤结？木地板疤结，地板黑点,
地板疤结
Why is there a lot of black knots in the purchased hardwood floor? Wooden floor knots, floor black spot?
A natural wood floor, the wood knots is also part of the product. Natural timber knots is bound to exist, and the manufacturer will repair the knots, generally according to European and American needs and use black or brown to fill.
Product users do not need to worry about the knots will fall off after repair. After nearly one hundred years of use, there has been almost no phenomenon of the falling off by itself after repair.
If the customer has special requirements for the product, please be sure to clearly inform the supplier do not want to have knots, a professional floor supplier, often have two types of products, one is the normal products that is natural products, the other is the selected products. The flooring industry is known as “PRIME GRADE” or” AB GRADE”.
Knots and any voids (that is hollows associated with them) are permitted within limits in all three grades. The knots
must be sound (will not fall out), however in Select Grade the splits that can be seen within these knots, known
as knot checks, are not permitted. For this reason even though the size of the small knot in the first photo may be
within Select Grade limits, the knot check would cause it not to meet grade. Due to this, even small knots are often
not found in Select Grade boards. Knot checks are permitted in both Medium Feature – Standard Grade and High
Feature Grade. The knot in the second photo meets Medium Feature – Standard Grade requirements and the knot
in the third photo meets High Feature Grade.
