Toshiba 451C To adjust the image quality in black-and-white printing, Value Acceptable Default

3. Printer-specific Adjustments

To adjust the image quality in black-and-white printing

("Mono" is selected from among the "Color" options on the PCL5c or PS3 printer driver. To print using PCL6, "Mono" is selected from among the "Color Resolution Type" options on the Macintosh printer driver.)

*The "Color" options are available in the "Setup" tab on the PCL5c and PS3 printer drivers. The "Color Resolution Type" is available in the "Quality" menu on the Macintosh printer driver. Note that "Color" options are not present since PCL6 only applies to monochrome printing.

(a)Enter adjustment mode [05]. Increase the value for code [597], [598] or [599]. Adjust the gamma curve balance and increase the density in black-and-white printing.

• Adjust the [05] codes corresponding to the PDL to be applied.

*Printing on Macintosh is performed in PostScript. (See the "PS3" row in the table below.)

PDL	Halftone	[05] code	Subcode	Value	Acceptable	Default
				recommended	value range
PCL5c	Detail	05-599	0/1/2	Set a value larger	0 to 255	128
PCL5c/PCL6	Smooth	05-598	0/1/2
				than 128.
PS3	Detail	05-597	0/1/2

*Set the value in increments of approximately 10, while checking the printout until the optimum value is obtained.

*The subcode varies, according to the area for which the density is adjusted. Refer to the table below and set the subcode for the area to be adjusted.

Subcode	Area for the density to be adjusted
0	Low-density area
1	Medium-density area
2	High-density area

<Note> • After performing the adjustment, the values changed will be applied to all printouts for the "Halftone" option. (For instance, if the values for [05] code for PCL and Detail are changed, they will be applied to printing performed with PCL5c and Halftone = "Detail" (or "Auto") selected.) Carefully perform the adjustment, being aware that the image quality of all future printouts will be changed, when printing out originals other than the one that is used for the adjustment.

•PCL6 and PCL5c use "Smooth" of the "Halftone" options in common. Note that a change to the 05-598 setting has impact on printouts with "Mono" and "Smooth" selected in the "Color" and the "Halftone" options respectively in PCL5c, as well as printouts using PCL6.

(When "Mono" is selected in the "Color" options in PCL5c, particular attention should be given since the default setting for the "Halftone" options is "Smooth.")

•When "Mono" is selected in the "Color" options and "Auto" (default) is selected in the "Halftone" options in PS3, "Detail" of the "Halftone" options is applied to text and graphics (illustrations), and "Smooth" is applied to raster data (images). Therefore, particular attention is required since the adjustment may have different impact according to patterns of the image to be printed.

‰Cautions after the completion of the adjustment

Carefully perform the adjustment while printing out images, since the adjustment may cause grainness or gradation variations.

e-STUDIO281c/351c/451c 3.7