News & Events

RSS

Experiment : Question-and-answer in Wajima Kirimoto

In this field trip, with Wajima Kirimoto’s cooperation, we conducted an experiment in order to clarify the characteristic of Wajimanuri lacquerware. In this experiment, we prepared six types of container, 1) plastic, 2) ceramic, 3) Wajimanuri lacquerware (makiji type), 4) stainless steel, 5) glass, 6) Wajimanuri lacquerware (traditional type) . I have explained each of the container’s information in Table.1. At first, we poured hot water (60) into each container at the same time, then recorded the temperature of the water in each container after two minutes and again after five minutes (Table.2). In addition, we measured sensible temperature by holding and feeling the warmth of each container that we poured hot water into. As a result, we discovered that there was no great difference in the actual temperature of hot water in each container, however, I thought there was more difference in sensible temperature when we held them. According to our sensible temperature, the order of hotness from hottest to coolest is: stainless steel, ceramic, glass, plastic, Wajimanuri lacquerware (makiji type) and Wajimanuri lacquerware (traditional type). Following the result of our sensible temperature, particularly, Wajimanuri lacquerware is hard for heat to travel through. However, this experiment is groping step and we have to improve the accuracy of this experiment. For example, we should standardize the diameter of container which we used. In addition, we have to compare containers from other characteristics’ perspective also, for example, heat transfer of coldness and durability.

 After we experimented, we asked Wajima Kirimoto questions by visiting a Wajima Kirimoto. There was only limited time, but, we questioned to the very last. For example, we asked where wood-producing district is. According to answer of Wajima Kirimoto, many kinds of tree is used for wooden base of Wajimanuri lacquerware. For instance, zelkova and hiba arborvitae are domestically produced wood. On the other hand, paulownia and agathis are foreign-produced wood. We saw they use not only domestically produced wood, but also foreign-produced wood for the under material. Additionally, we asked if there is health damage when they gather lacquer, because most Asian people have an impression that lacquer is poisonous. According to answer of Wajima Kirimoto, those who gather lacquer has tolerance, besides, they protect themselves by wearing gloves and long sleeves. As I have said above, most questions were about lacquer or wood. Moreover, in recent years, Chinese lacquer is increasing in price, and such an increase influences Japanese lacquerware industry as well. Therefore, I grasped Wajimanuri lacquerware is a global product from each material. Therefore, I think we have to look at Wajimanuri lacquerware with the viewpoint of foreign situation as well.(M.O)


Table 1: Information of each container

 

 

diameter

weight

height

thickness

plastic

11.2cm

94g

6.6cm

6mm

ceramic

11.4cm

210g

6.5cm

3.5mm

Wajimanuri lacquerware(makiji type)

11.5cm

114g

6.9cm

4.2mm

stainless steel

13.0cm

83g

5.6cm

1mm

glass

12.0cm

223g

6.0cm

4mm

Wajimanuri lacquerware(traditional type)

13.7cm

119g

6.2cm

5mm


Table 2: each container and water temperature

 

 

after 2 minutes

after 5 minutes

plastic

53.3

48.8

ceramic

52.9

47.8

Wajimanuri lacquerware(makiji type)

53.0

48.1

stainless steel

53.3

47.8

glass

48.4

44.6

Wajimanuri lacquerware(traditional type)

51.0

45.9

 

 

 

 

 

masa-3
masa-2

PAGE TOP