"What is the meaning of ICUMSA and to what does it relate?" In order to attempt to help, let me quote the following from the ICUMSA Handbook:
Methods are recommended for tentative approval by ICUMSA in the first instance. Upon meeting all of the Commission's requirements, methods are accorded official status. Methods which are demonstrably useful and have found an established application, or which do not lend themselves to collaborative testing are given an Accepted status"
However, SGS of Sao Paulo, in the same memo, lists ICUMSA 46 for the highest EU grade and ICUMSA 42 for E.U. raws, which is opposite to Brazil. SGS itself in either Brazil or Switzerland is not much help in this area, even although they have published the memo listing specifications and are supposed to be the authority.
When one speaks to ICUMSA directly, they refer to a third method which is totally different. How does one know what one is buying?
The only sure method is to be first totally versed in sugar as a starting point and understanding these differences. Next, although many brokers use the term 'rbu' with reference to ICUMSA for Brazilian sugar, few understand its meaning. RBU, as used in this sense, means "Reference Base Units". But to what it is referenced is the key. All major buyers such as Coca Cola etc have their own reference for this purpose. If you do not have a reference, or are not acceptable to the reference supplied by the refinery or SGS, then you would request sugar ICUMSA to be expressed in TU or ICUMSA Units. Which brings one to the methods used by the British Sugar Corporation - are you confused yet?
The TU is heavily dependent upon "ash points", which are defined as "Conductivity ash, % , expressed to three decimal places" (British Sugar Corp., Central Laboratory, ICUMSA Headquarters). Further used to weight the TU is "reflectance Grade Colour" and "Solution Colour" or "Filtered Colour" as it is referred to, which have formulas for determination equally confusing as the one for "Ash Points". Thus, as you see, this is not easily understood by the novice.
The buyer is best protected by having an understanding of the method used by the provider to obtain the proper product complying to the proper specification. Country of Origin specifications usually rule. These specifications are then detailed in the contract.
Traders should note that the term "INCUMSA" with an "N" is not a valid sugar trade term. (Also, it is interesting to see offers which include the words "Grade A", which of course no sugar refinery or seller uses!)
a) I"N"CUMSA 45 rbu, followed on the next line by b) "COLOR: Sparkling White, etc". Offers which we receive in this format go directly to File 13. I hope this helps. We have to stay in contact with SGS, BSC etc in order to keep up with all that is required"
TO: CANE SUGAR TRUST CO. LTD
CANE SUGAR - WHAT IS IT?