Prototype aluminum mold for stampers and method for manufacturing same, stamper and method for manufacturing same, method for manufacturing article, and antireflection article

A stamper used in the manufacturing of articles having a fine irregular surface structure on the surface thereof, wherein

• the stamper has a prototype aluminum mold, and
• the prototype aluminum mold having a fine irregular surface structure formed on the surface of the prototype aluminum mold in which the average interval between pores is equal to or less than the wavelength of visible light, and
• the content of magnesium in the prototype aluminum mold is 0.1% by mass to 3% by mass, the content of silicon is 100 ppm by mass or less, the total content of elements other than aluminum and magnesium is 500 ppm by mass or less,
• the prototype aluminum mold contains magnesium silicide particles, and
• the number of magnesium silicide particles having an equivalent diameter of 10 nm to 250 nm on the surface of the stamper is 10/1000 μm2 or less.