Image forming method
Provided is a method for forming an image containing the sequential steps of: forming a foil adhesion toner image on an image supporting substrate with a foil adhesion toner (α) which comprises at least a binder resin containing a thermoplastic resin using an electrophotographic method; forming a foil image on the foil adhesion toner image by contacting a transfer foil on the foil adhesion toner image with applying heat; and forming a visible toner image on the image supporting substrate which has been formed with the foil image with at least one image forming toner (β) using an electrophotographic method, followed by fixing the visible toner image by applying heat and pressure thereto, wherein Δ(Tsp(α)−Tsp(β)) is 5 to 50° C., provided that Tsp (α) is a softening point of the foil adhesion toner (α) and Tsp (β) is a softening point of the image forming toner (β).
1. A method for forming an image comprising the sequential steps of:
forming a foil adhesion toner image on an image supporting substrate with a foil adhesion toner (.alpha.) which comprises at least a binder resin containing a thermoplastic resin using an electrophotographic method;
forming a foil image on the foil adhesion toner image by contacting a transfer foil on the foil adhesion toner image with applying heat to the transfer foil; and
forming a visible toner image on the image supporting substrate which has been formed with the foil image with at least one image forming toner (β) using an, electrophotographic method, followed by fixing the visible toner image by applying heat and pressure thereto,
wherein a difference of two softening points expressed as Δ(Tsp(α)−Tsp(β) is 5 to 50° C., provided that Tsp (α) is a softening point of the foil adhesion toner (α) and Tsp (β) is a softening point of the image forming toner (β).
2. The method for forming an image of claim 1 ,
wherein the visible toner image is fixed at a temperature of 150 to 230° C. and a nip time for fixing the visible toner image is 10 to 300 msec.
3. The method for forming an image of claim 1 , wherein the foil adhesion toner (α) has a softening point of 105 to 140° C., and the foil adhesion toner (α) contains a binder resin which has a resin component having a molecular weight (Mw) of 60,000 or more in a molecular weight distribution measured with GPC in an amount of 10 to 30 mass % based on the total amount of the binder resin.
4. The method for forming an image of claim 3 , wherein the binder resin contained in the foil adhesion toner (α) is a styrene-acrylic resin.
5. The method for forming an image of claim 3 , wherein the foil adhesion toner has a softening point of 112 to 137° C.
6. The method for forming an image of claim 3 , wherein the binder resin contained in the foil adhesion toner (α) has a weight average molecular weight of 10,000 to 30.000.
7. The method for forming an image of claim 1 , wherein the toll image and the visible toner image each are formed using the same fixing device with the same heating temperature and of the same nip time.
8. The method for forming an image of claim 1 , wherein the difference of two softening points expressed as Δ(Tsp(α)−Tsp(β)) is 6 to 28° C.
9. The method for forming an image of claim 1 , wherein the foil adhesion toner (α) is a clear toner.