Adjacent benzene is general-purpose colophony 160, double-loop (DC) the hand papers colophony 230, man-made stone / stone stone colophony 170, pull crowded colophony 210, twine structural layer colophony 220, twine a benzene liner colophony 210, colophony of NPG mould pressing 190, colophony of DPG mould pressing 420. Value of raw material market rises continuously, colophony price continues to move 200 yuan- - 300 yuan. 2 mellow prices approach this Zhou Shun anhydride and third again the history is new tall, other breed also is in exalted concussion situation, UPR cost rises continuously. At present UPR market is in apparent sluggish to bilge condition, cost rises continuously, downstream demand is dejected, especially composite material industry appeared the apparent systole of many markets territory, UPR industry adds an inter, fluctuation be in a dilemma. If short-term inside this kind of situation is changed hard, so the sale gross of market of UPR of second half of the year will be very possible this year will appear to drop apparently compared to the same period. Meanwhile, more UPR are new increase production can will put in the market centrally in second half of the year, at the appointed time the market competes will more miserable intense. " experience introduction " : The downstream client of UPR is more very with export or project kind the market is relevant, accordingly downstream user often hopes to be in accept the order when can will export order for goods or one-time all lock decides the UPR amount that project order place needs and value, but the force with upriver market because UPR industry is right enough lack and control force, the price of UPR factory can passive follow of price of upriver raw material change and undertake adjustment. Accordingly, every time UPR price appears relatively during changing substantially, create the contradiction between UPR factory and downstream user easily. Divide the experience of the enterprise according to eye forehead, good means of settlement is UPR produces factory and downstream client to undertake deepness bind, the interest shares everybody, the risk is carried together, who doesn't blame. Particular way is: In sign gross contract when, sign a price to change adjust methodological clause, namely basis " colophony price index " the price index that publishs is fluctuant extent, both sides assumes price index severally 50% of fluctuant part, calculate every week the price, implement the price actually as what delivering goods day is in a week. The practice of partial enterprise proves, this kind of method not only fairness is reasonable, and those who have the price but foresight, need not both sides delivers goods every time want bargain. This experience consults for everybody.