Type of paint

Time taken for the wood to catch  fire.(second)

Observations

Picture

Normal with no chemical

4 seconds

It was very quick and completely burnt.

Figure1.The wood was about catching  fire

Figure2: After burning.

With 4.2g of NaHCO₃

7. 23 seconds

It took a little long for the wood to catch fire. A little smoke was released.

Figure 3: The wood was about catching fire

Figure 4: After burning

With 8g of NaHCO₃

15. 51 seconds

The time for catching  fire was longer than the previous test. Smoke was released obviously.

Figure 5: The wood was about catching  fire

Figure 6: After burning.

With 12g of NaHCO₃

17.22 seconds

The flame was weak. The wood caught  fire for a long time. There was some paint cracking. CO₂ was released greatly.

.

Figure 7: The wood was about catching fire

Figure 8: After burning.

With 16g of NaHCO3

22.07 seconds

The flame could not be seen. Time taken to catch  fire was  very low.  A lot of CO₂ was release. Fire left just a small dark burnt area.

Figure 9: The wood was about catching fire.

Figure 10: After burning

With 4.2g Ash

25.1 seconds

Time taken for catching  fire  was the longest. Released a lot of CO₂ in very weak flame. Fire left a small dark grey burnt area.

Figure 11: The wood was about catching  fire.

Figure 12: After burning.

Type of paint

Time taken for the wood to catch  fire ( minute)

Observation

Pictures

 With 10g of ash

 1.57 minutes

 It was really slow for the wood to catch  fire. When it caught  fire, it burnt with a weak low flame. It also left a small black mark. Compressed  0.2 cm.

Figure1: The wood was about catching  fire.

Figure 2: After burning

 With 20g of NaHCO₃

1.30 minutes

The flame could not be seen even though the wood was burning.CO₂ was released . Small dark mark was formed. Compressed 0.3 cm.

Figure3: The wood was about catching fire.

Figure 4: After burning.