If you test in laboratory, 10g-20g is enough.If you cook bread in oven, 100-300g is enough.Normally we send sample by 2kg with free charge.
We supply free sample, buyer share the shipping cost. It is reasonable for each other.below is some normal ways to operate the shipping cost :
♦The buyer can call the local DHL, TNT, UPS, Fedex or other express company to pick up samples from our company, their China branch will go to our company and take the samples, then you will receive sample soon and pay the air freight to local express company by yourself directly.
♦The buyer can tell us the collect account number with DHL, TNT, UPS, or Fedex , then we can send samples on buyer’s account, it is the more easy to do.
♦The buyer can transfer the shipping charge into our company's account . after we receive the money for air freight cost, we will send samples immediately by Fedex.