Table 1
Preliminary experimental test for set HPP conditions

Sample1)	Pressure (MPa)	Time (sec)
Control	-	-
BS-1	550	30
BS-2	550	60
BS-3	500	60
BS-4	500	120
BS-5	450	120

Control, non-treated birch sap; BS-1, birch sap treated with 550 MPa pressure for 30 sec; BS-2, birch sap treated with 550 MPa pressure for 60 sec; BS-3, birch sap treated with 500 MPa pressure for 60 sec; BS-4, birch sap treated with 500 MPa pressure for 120 sec; BS-5, birch sap treated with 450 MPa pressure for 120 sec.