Characterization of Vietnamese Lacquer Collected in Different Seasons

Table 2

Compositions of season Vietnamese lacquer.

Samples

Drying time^1 (h)

Hardness^2 for drying days

DF

TF

HD

1

2

3

4

5

6

7

14

21

T6

4.3

5.4

8.0

<6B

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

T7

3.8

4.8

8.8

<6B

<6B

<6B

<6B

<6B

<6B

<6B

<6B

5B

T8

2.6

3.2

6.0

<6B

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

T9

6.5

7.5

15.0

<6B

<6B

<6B

<6B

<6B

<6B

<6B

5B

5B

T10

2.8

3.5

6.5

<6B

<6B

5B

5B

5B

5B

5B

3B

3B

T11

4.0

5.0

8.5

<6B

<6B

<6B

6B

5B

5B

5B

3B

3B

T12

4.0

4.7

8.5

<6B

<6B

<6B

6B

5B

5B

5B

3B

3B

T1

7.8

8.5

16.0

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

4B

T2

2.8

3.5

6.0

<6B

<6B

<6B

<6B

<6B

<6B

4B

4B

4B

T3

2.0

3.0

4.5

<6B

<6B

<6B

<6B

<6B

<6B

4B

4B

3B

D6

14.0

15.5

<48

—

<6B

<6B

<6B

<6B

<6B

<6B

<6B

<6B

D7

6.0

8.2

<48

—

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

D8

3.8

5.5

<48

—

<6B

<6B

<6B

<6B

<6B

<6B

<6B

<6B

D9

2.7

3.2

4.5

<6B

<6B

6B

5B

5B

5B

5B

3B

3B

D10

2.5

3.0

5.0

<6B

<6B

<6B

5B

5B

5B

5B

4B

4B

D11

6.7

7.0

15.0

<6B

<6B

<6B

5B

5B

5B

5B

4B

4B

D12

3.0

4.0

5.5

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

4B

D1

3.8

4.3

8.0

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

4B

D2

1.5

2.0

3.5

<6B

<6B

<6B

<6B

<6B

<6B

<6B

4B

3B

D3

1.5

2.0

3.0

<6B

<6B

<6B

<6B

<6B

<6B

4B

4B

3B

¹Drying condition: 25°C, 80%RH, and wet thickness 76 m. DF: dust-free dry; TF: touch-free dry; HD: hard dry.
²Based on pencil hardness test method.