1. Anti heat stress clothing for construction workers in hot and humid weather Report 39

2. Calibration of skin temperature Method (by Dr Song) Utilize the hot plate in the fabric heat retention tester (hyperlink 织 物保暖仪 ). The calibration procedure is as follows: 1. Set the hot plate (“the temperature of the BT box heat plate is controlled with an error of less than 0.1 ℃ ”-specification) into a number of temperature points (skin temperature range: 28 ℃, 34 ℃, 40 ℃ -it is out the range of skin temperature; more temperature points should be calibrated). 2. Cover the temperature sensors with conductive epoxy (hiperlink 导热硅胶 ). 3. Place the temperature sensors on the hot plate and make sure the contact is excellent. 4. Record temperature values of the sensors at different temperature points. Start to record until the skin temperature is stable (after 1.5 min).

3. Results Test 1 when the setting of hot plate is 40oC. Sensor 1Sensor 2Sensor 3Sensor 4Sensor 5Sensor 6 38.7338.7538.923939.538.28 38.92-38.9839.0239.8638.41 39 38.5239.0239.0439.9438.43 39.0238.7239.0439.034038.28 39.0238.839.05 40.0238.25 38.8838.939.0639.0840.0438.44 38.838.9139.0539.1539.9838.42 38.7138.939.0239.1340.0338.53 38.7638.8839.0839.1940.0438.35 38.7838.8939.0539.1740.0338.51 38.838.9339.0239.2640.0538.47 38.8338.9839.0539.234038.57 38.8538.9439.0839.2740.0438.43 38.7539.0139.1439.3240.0538.52 38.838.9939.0239.2740.0638.61 38.8538.91 39.0640.0938.65 38.838.9738.8839.0140.0538.77 38.7538.923939.0740.0238.63 38.8638.9938.9439.0240.0438.37 38.838.9438.9138.9639.9738.3

4. Test 2 when the setting of hot plate is 34oC Sensor 1Sensor 2Sensor 3Sensor 4Sensor 5Sensor 6 33.5933.2833.533.2733.9932.72 33.5833.3633.533.3234.0532.68 33.533.3633.5133.4234.0532.72 33.54 33.4233.533.3234.0732.75 33.5933.533.5333.2934.132.81 33.5633.4433.5533.3434.0432.86 33.3433.433.5633.334.0732.85 33.4533.4333.4533.3934.0932.85 33.533.3433.3633.434.1632.8 33.5433.3733.3533.3434.132.83 33.4833.3833.3133.434.0332.81 33.5133.4433.2833.3934.1132.7 33.5833.3933.3233.3634.0932.92 33.6333.433.2733.3934.0732.98 33.5633.4533.333.3434.0932.89 33.5133.4733.233.2634.0732.92 33.5833.4133.2933.3234.1132.87 33.5233.4233.2933.3534.0732.72 33.5833.4833.2733.3634.0632.79 33.5933.533.3233.3434.0732.82

5. Test 3 when the setting of hot plate is 28 oC. Sensor 1Sensor 2Sensor 3Sensor 4Sensor 5Sensor 6 27.8727.927.89 27.927.78 27.9127.8827.9 28.1127.76 27.9327.89 28.1627.71 27.9627.927.9127.928.1727.72 27.93 27.8827.8727.9328.1627.7 27.9627.8727.8527.928.2227.76 27.9327.8627.8727.9228.2127.73 27.9127.8927.8827.9428.227.76 27.927.8827.8527.9128.1927.74 27.9127.8927.8827.9428.1827.73 27.9127.8927.8727.9328.1527.7 27.89 27.9127.9328.1427.65 27.9227.8427.9327.9128.1527.68 27.927.8727.9627.9128.1827.74 27.9127.8527.9127.8828.1727.71 27.8827.8927.927.8728.227.66 27.8627.8427.8827.928.1827.7 27.927.8627.8927.9128.2127.74 27.927.8327.928.1827.76 27.8927.8527.9127.9328.2127.72

7. Take the mean values of Sensor 1-4 as the “standard” value S1S2S3S4Standard valueS5S6 28 oC27.90927.87327.89327.91027.89628.16427.723 34 oC33.53733.41233.38333.34533.41934.07532.815 40 oC38.83638.88739.01139.11738.96239.99138.461 Calibration equation Sensor1T r1 =1.0124T m1 -0.4172R2=0.9997 Sensor2T r2 =1.0047T m2 -0.1225R2=1 Sensor3T r3 =0.9953T m3 +0.1545R2=1 Sensor4T r4 =0.9872T m4 +0.3957R2=0.9997 Sensor5T r5 =0.9357T m5 +1.5406R2=1 Sensor6T r6 =1.0297T m6 -0.5526R2=0.9992 Tr: Real temperature, Tm: Measured temperature

8. Attachment of skin temperature sensor