What was found
DURING CLIMBOUT HAD STRONG UNKNOWN FUMES IN COCKPIT FOR 2-3 MINUTES. THAN SEEMED TO BE DISSAPPATING, BUT AT LEVEL OFF AT FL 380 STARTED COMING BACK. DECLARED AN EMERGENCY AND DIVERTED. PER B757 FIM 21-00-01-3 VERIFIED ALL ENG OIL AND HYD NOT OVER SERVICED. NO EXTERNAL LEAKING. FOUND CHEMICAL SHIPMENT CAUSING STRONG ODOR. SHIPMENT REMOVED FROM AIRCRAFT A/C, OPENED FOR APROX 6 HOURS. NO FUMES NOTICEABLE. RAN A/C PER B757 JRH AND MM 71-00-00-5-3 TO CLOSE COMPRESSOR BLEED VALVES. NO FUMES ON EITHER ENG. A/C OK FOR SERVICE.