Post by jinn on Mar 26, 2012 2:33:11 GMT 8
IMPORTANT NOTE FOR THOSE DOING WEATHERING WITH TURPS OR WHITE SPIRITS.
This is something i just found out today. Much to my dismay. Gundam plastics crack when treated with turps or white spirits. As many of u all know turps and white spirits are used for weathering and it is a normal method used together with pigments and oil paints.
At first I did not know what was happening coz this has never happened to me in all my modelling with other kits. After a while i suspected it was the spirits and was confirmed by Whitebase. Look at the results of gundam plastics coming in contact with white spirits.
I decided to try an experiment and used one of the spare parts from the zaku coil (don't know what it's called the one located at the waist). I put one in a crocodile clip and left it for 10 mins nothing happened.
I took another one and put it in the same crocodile clip and the applied white spirits to it and u can see the result; this happened in seconds.
This kit was my lesson in Murphy's law... Everything went wrong...
Next kit.
Luckily it was a test/experimental 1st kit. Cannot imagine if this happened to one of the sifu's.
One solution is Sansodor. However it should be said that becareful when applying turps to gundam plastics.
same simple test 30 mins later energy coil still intact.
tested it also by comparing the bending of sprues cut at same length treated with different solvents.
1. non-treated broke when 2 ends touched
2. treated with white spirits broke immediately when bent slightly
3. treated with sansodor same as no. 1
From Wikipedia:
"Sansodor is a brand of odorless mineral spirit (OMS) produced by Winsor & Newton, a fine arts company based in the United Kingdom.
Application: Sansodor is a highly refined odorless mineral spirit that is used to dilute (thin) artists' oil paints and is also used to dilute oil media (linseed oils, alkyd media, etc.). To conform to the "fat over lean" rule in oil painting, Sansodor should be considered a "lean" medium (although, technically it is a thinner) and, therefore, used mostly in the initial layers of a painting. The addition of "fat" media like alkyd (faster drying) and linseed (slower drying) are progressively added into the subsequent layers of the painting in conformance to the "fat over lean" rule. Another guideline to follow is to use faster drying media (like alkyd) in the lower layers of the painting and use slower drying media (like linseed) in the later layers to ensure the bottom layers dry first. Although Sansodor can be used to reduce the viscosity of these media (thick media like stand oil and alkyds) to increase their flow, it should never exceed 50% of any oil paint medium mixture to ensure proper pigment bonding.
Sansodor is compatible with most brands of oil paints and media and can also be used as a brush cleaner for oil, water-soluble oil, and alkyd painting.
Safety: Unlike turpentine that has been used traditionally in oil painting, Sansodor is less toxic because it has been refined to remove harmful aromatic solvents found in hydrocarbons. Sansodor also has a higher personal exposure limit (OSHA TLV of 300 ppm) compared to turpentine (a TLV of 100 ppm), or three times less hazardous than turpentine. Sansodor also has a slower evaporation rate than turpentine which makes it safer than turpentine in terms of inhalation risks. Although it is odorless, Sansodor should be used in a well ventilated area. Sansodor because it is a form of petroleum hydrocarbon is volatile in high temperatures (it has a flashpoint of 174 degrees fahrenheit) so care should be taken to store it in a cool place.
Sansodor has been evaluated by the Arts & Creative Materials Institute (ACMI) and bears the Caution Label(CL). The Caution Label signifies that Sansodor can be handled safely if the directions on the container or packaging are followed. When used in properly supervised and controlled conditions, such products can be enjoyed with complete safety."
This is something i just found out today. Much to my dismay. Gundam plastics crack when treated with turps or white spirits. As many of u all know turps and white spirits are used for weathering and it is a normal method used together with pigments and oil paints.
At first I did not know what was happening coz this has never happened to me in all my modelling with other kits. After a while i suspected it was the spirits and was confirmed by Whitebase. Look at the results of gundam plastics coming in contact with white spirits.
I decided to try an experiment and used one of the spare parts from the zaku coil (don't know what it's called the one located at the waist). I put one in a crocodile clip and left it for 10 mins nothing happened.
I took another one and put it in the same crocodile clip and the applied white spirits to it and u can see the result; this happened in seconds.
This kit was my lesson in Murphy's law... Everything went wrong...
Next kit.
Luckily it was a test/experimental 1st kit. Cannot imagine if this happened to one of the sifu's.
One solution is Sansodor. However it should be said that becareful when applying turps to gundam plastics.
same simple test 30 mins later energy coil still intact.
tested it also by comparing the bending of sprues cut at same length treated with different solvents.
1. non-treated broke when 2 ends touched
2. treated with white spirits broke immediately when bent slightly
3. treated with sansodor same as no. 1
From Wikipedia:
"Sansodor is a brand of odorless mineral spirit (OMS) produced by Winsor & Newton, a fine arts company based in the United Kingdom.
Application: Sansodor is a highly refined odorless mineral spirit that is used to dilute (thin) artists' oil paints and is also used to dilute oil media (linseed oils, alkyd media, etc.). To conform to the "fat over lean" rule in oil painting, Sansodor should be considered a "lean" medium (although, technically it is a thinner) and, therefore, used mostly in the initial layers of a painting. The addition of "fat" media like alkyd (faster drying) and linseed (slower drying) are progressively added into the subsequent layers of the painting in conformance to the "fat over lean" rule. Another guideline to follow is to use faster drying media (like alkyd) in the lower layers of the painting and use slower drying media (like linseed) in the later layers to ensure the bottom layers dry first. Although Sansodor can be used to reduce the viscosity of these media (thick media like stand oil and alkyds) to increase their flow, it should never exceed 50% of any oil paint medium mixture to ensure proper pigment bonding.
Sansodor is compatible with most brands of oil paints and media and can also be used as a brush cleaner for oil, water-soluble oil, and alkyd painting.
Safety: Unlike turpentine that has been used traditionally in oil painting, Sansodor is less toxic because it has been refined to remove harmful aromatic solvents found in hydrocarbons. Sansodor also has a higher personal exposure limit (OSHA TLV of 300 ppm) compared to turpentine (a TLV of 100 ppm), or three times less hazardous than turpentine. Sansodor also has a slower evaporation rate than turpentine which makes it safer than turpentine in terms of inhalation risks. Although it is odorless, Sansodor should be used in a well ventilated area. Sansodor because it is a form of petroleum hydrocarbon is volatile in high temperatures (it has a flashpoint of 174 degrees fahrenheit) so care should be taken to store it in a cool place.
Sansodor has been evaluated by the Arts & Creative Materials Institute (ACMI) and bears the Caution Label(CL). The Caution Label signifies that Sansodor can be handled safely if the directions on the container or packaging are followed. When used in properly supervised and controlled conditions, such products can be enjoyed with complete safety."