1

00:00:00.05 --> 00:00:01.03

- [Instructor] In this movie,



2

00:00:01.03 --> 00:00:03.09

we'll take a look at the

effect of color space,



3

00:00:03.09 --> 00:00:06.05

that is rgb versus cmyk,



4

00:00:06.05 --> 00:00:08.00

on blend modes.



5

00:00:08.00 --> 00:00:10.00

And to make a long story short,



6

00:00:10.00 --> 00:00:13.03

blend modes are designed

specifically to work in rgb.



7

00:00:13.03 --> 00:00:15.09

They started in Photoshop after all.



8

00:00:15.09 --> 00:00:19.09

And so, they often don't

work nearly as well in cmyk,



9

00:00:19.09 --> 00:00:23.01

especially the brightening

modes such as screen.



10

00:00:23.01 --> 00:00:24.07

And that's ultimately the result



11

00:00:24.07 --> 00:00:27.07

of having that additional black ink.



12

00:00:27.07 --> 00:00:31.02

Alright, so, I've got two

versions of this file open.



13

00:00:31.02 --> 00:00:32.08

I'm going to go ahead and switch over



14

00:00:32.08 --> 00:00:34.09

to the comparative file here.



15

00:00:34.09 --> 00:00:37.04

Currently they're both in rgb,



16

00:00:37.04 --> 00:00:39.04

as you can see up here in the title tab.



17

00:00:39.04 --> 00:00:41.04

I'm going to switch this guy to cmyk



18

00:00:41.04 --> 00:00:42.09

by going to the file menu.



19

00:00:42.09 --> 00:00:44.07

Choosing document color mode.



20

00:00:44.07 --> 00:00:46.06

And choosing cmyk color.



21

00:00:46.06 --> 00:00:48.02

And you'll immediately notice



22

00:00:48.02 --> 00:00:50.04

the saturation levels disappearing



23

00:00:50.04 --> 00:00:52.01

in that violent gradient.



24

00:00:52.01 --> 00:00:55.06

And that's just because

cmyk cannot express



25

00:00:55.06 --> 00:00:57.06

a lot of these colors.



26

00:00:57.06 --> 00:01:00.09

Now notice that this

is a one-way operation.



27

00:01:00.09 --> 00:01:02.07

If I return to the file menu,



28

00:01:02.07 --> 00:01:04.02

choose document color mode,



29

00:01:04.02 --> 00:01:06.05

and choose rgb color again.



30

00:01:06.05 --> 00:01:08.08

Ill bring back some of the

colors in my placed image



31

00:01:08.08 --> 00:01:09.07

because after all,



32

00:01:09.07 --> 00:01:12.02

it's linked to an rgb file on disk.



33

00:01:12.02 --> 00:01:14.02

But I'm not going to

bring back the gradient.



34

00:01:14.02 --> 00:01:16.06

I would have to reassign

those colors manually



35

00:01:16.06 --> 00:01:20.08

because they have been

converted to cmyk values.



36

00:01:20.08 --> 00:01:22.06

But I'm going to press control z,



37

00:01:22.06 --> 00:01:23.05

or command z on a Mac,



38

00:01:23.05 --> 00:01:26.07

so that the right hand

image is in the cmyk space,



39

00:01:26.07 --> 00:01:28.07

as we can see up here in the title tab.



40

00:01:28.07 --> 00:01:31.06

And incidentally, I've

hidden my right side panels



41

00:01:31.06 --> 00:01:33.00

by pressing shift tab



42

00:01:33.00 --> 00:01:36.00

just so that we have

some more room on screen.



43

00:01:36.00 --> 00:01:38.08

Now I'm going to go ahead

and select the image



44

00:01:38.08 --> 00:01:40.06

on the left hand side here.



45

00:01:40.06 --> 00:01:42.03

And I'm going to hide

those selection edges



46

00:01:42.03 --> 00:01:43.04

by pressing control h,



47

00:01:43.04 --> 00:01:45.01

or command h on a Mac,



48

00:01:45.01 --> 00:01:46.06

and if you'll permit me,



49

00:01:46.06 --> 00:01:48.03

just for the sake of expediency



50

00:01:48.03 --> 00:01:49.08

so that we don't have to keep bringing



51

00:01:49.08 --> 00:01:51.02

up the transparency panel



52

00:01:51.02 --> 00:01:54.02

I will rely on my dq shortcuts.



53

00:01:54.02 --> 00:01:55.09

So I'll press shift

one to switch the image



54

00:01:55.09 --> 00:01:58.05

to switch the image to

the multiply blend mode.



55

00:01:58.05 --> 00:02:00.03

And I want you to notice here



56

00:02:00.03 --> 00:02:01.05

this stroke



57

00:02:01.05 --> 00:02:04.08

because the blend mode is

assigned to the entire object



58

00:02:04.08 --> 00:02:07.01

it's assigned to the stroke as well.



59

00:02:07.01 --> 00:02:09.07

And so, if I were to switch it to screen,



60

00:02:09.07 --> 00:02:11.01

by pressing shift two,



61

00:02:11.01 --> 00:02:13.05

that black stroke is going to drop away



62

00:02:13.05 --> 00:02:16.00

because black is always transparent



63

00:02:16.00 --> 00:02:18.03

when combined with the screen mode.



64

00:02:18.03 --> 00:02:20.05

So I just want you to bear that in mind.



65

00:02:20.05 --> 00:02:22.09

Switch back to multiply, like so,



66

00:02:22.09 --> 00:02:25.07

and I'll go ahead and recenter my zoom.



67

00:02:25.07 --> 00:02:27.04

Here we are looking at the image



68

00:02:27.04 --> 00:02:28.06

set to the multiply blend mode



69

00:02:28.06 --> 00:02:30.08

in the rgb space.



70

00:02:30.08 --> 00:02:32.08

Now I'll click on the cmyk image.



71

00:02:32.08 --> 00:02:34.01

Once again press control h,



72

00:02:34.01 --> 00:02:35.04

or command h on a Mac,



73

00:02:35.04 --> 00:02:37.05

and I'll press shift one.



74

00:02:37.05 --> 00:02:39.02

And you can see that we get,



75

00:02:39.02 --> 00:02:40.01

if nothing else,



76

00:02:40.01 --> 00:02:41.09

a dingier effect



77

00:02:41.09 --> 00:02:45.03

that's a lot heavier where

the black is concerned.



78

00:02:45.03 --> 00:02:47.04

And that's because we're

burning in the shadows



79

00:02:47.04 --> 00:02:50.02

where the black ink is concerned.



80

00:02:50.02 --> 00:02:52.06

And so, the shadow

under the lip is darker.



81

00:02:52.06 --> 00:02:57.06

And we have higher contrast

effects throughout the face.



82

00:02:57.06 --> 00:02:59.04

And so that's just

something to bear in mind.



83

00:02:59.04 --> 00:03:00.07

It doesn't look too bad.



84

00:03:00.07 --> 00:03:01.07

It looks okay.



85

00:03:01.07 --> 00:03:03.01

And one of the reasons is



86

00:03:03.01 --> 00:03:06.08

because multiply and

cmyk go hand and hand.



87

00:03:06.08 --> 00:03:08.06

When you're laying inks

on top of each other



88

00:03:08.06 --> 00:03:13.01

you're effectively multiplying

those inks together.



89

00:03:13.01 --> 00:03:15.05

That's not the case where

screen is concerned however.



90

00:03:15.05 --> 00:03:17.06

So I'll just go ahead and

switch over to the first window



91

00:03:17.06 --> 00:03:20.02

and I'll press shift two this time around



92

00:03:20.02 --> 00:03:23.04

in order to achieve that

kind of floating head effect.



93

00:03:23.04 --> 00:03:25.04

Very nice smooth highlights.



94

00:03:25.04 --> 00:03:27.02

Now I'll switch over to the cmyk image



95

00:03:27.02 --> 00:03:28.06

and press shift two.



96

00:03:28.06 --> 00:03:31.03

You can see that the effect

is totally different.



97

00:03:31.03 --> 00:03:33.07

And that's because of that black ink.



98

00:03:33.07 --> 00:03:35.00

And so to see what that looks like



99

00:03:35.00 --> 00:03:36.03

I'll go up to the window menu



100

00:03:36.03 --> 00:03:38.02

and I'll choose separations preview



101

00:03:38.02 --> 00:03:41.05

to bring up the separations

preview panel right here.



102

00:03:41.05 --> 00:03:43.06

I'll turn on the over

print preview check box.



103

00:03:43.06 --> 00:03:47.03

And then I'll go ahead and

turn off the colorful inks,



104

00:03:47.03 --> 00:03:49.09

that is cyan, magenta, and yellow.



105

00:03:49.09 --> 00:03:52.05

And you can see this is what

we have in the black channel.



106

00:03:52.05 --> 00:03:53.07

Nothing.



107

00:03:53.07 --> 00:03:57.02

So we've just basically

wiped out that black channel.



108

00:03:57.02 --> 00:03:59.09

And as a result, we have nothing to go on



109

00:03:59.09 --> 00:04:02.06

but cyan, magenta, and yellow,



110

00:04:02.06 --> 00:04:06.07

which is why we end up with

this very washed out effect.



111

00:04:06.07 --> 00:04:08.03

So screen in particular



112

00:04:08.03 --> 00:04:12.09

is just not going to work

out very well in cmyk



113

00:04:12.09 --> 00:04:16.06

unless you take the time to

remove black as an ingredient



114

00:04:16.06 --> 00:04:18.08

from whatever object it is,



115

00:04:18.08 --> 00:04:20.02

gradient or otherwise,



116

00:04:20.02 --> 00:04:23.03

that you're assigning the blend mode to.



117

00:04:23.03 --> 00:04:26.04

So I'll just go ahead and

switch back to cmyk here.



118

00:04:26.04 --> 00:04:28.04

Let's take a look at a

couple of other guys.



119

00:04:28.04 --> 00:04:30.04

For example, overlay



120

00:04:30.04 --> 00:04:31.07

in rgb.



121

00:04:31.07 --> 00:04:33.08

And then over here in cmyk



122

00:04:33.08 --> 00:04:35.03

we have overlay.



123

00:04:35.03 --> 00:04:37.06

Overlay is definitely getting sacrificed



124

00:04:37.06 --> 00:04:39.09

where cmyk is concerned.



125

00:04:39.09 --> 00:04:42.01

Whereas, if I switch back to rgb



126

00:04:42.01 --> 00:04:44.09

and press shift five for hard light,



127

00:04:44.09 --> 00:04:46.06

and then switch to cmyk



128

00:04:46.06 --> 00:04:48.06

and press shift five,



129

00:04:48.06 --> 00:04:50.07

the effect holds up a whole lot better.



130

00:04:50.07 --> 00:04:53.09

We do have some very

high contrast transitions



131

00:04:53.09 --> 00:04:56.03

but it's not a bad looking effect.



132

00:04:56.03 --> 00:04:58.01

I'm going to skip ahead here,



133

00:04:58.01 --> 00:04:59.02

this time around,



134

00:04:59.02 --> 00:05:01.08

by selecting the image in rgb once again.



135

00:05:01.08 --> 00:05:04.04

And this time I'll just press shift eight,



136

00:05:04.04 --> 00:05:06.08

in order to switch to luminosity.



137

00:05:06.08 --> 00:05:09.07

Which looks absolutely

gorgeous here in rgb.



138

00:05:09.07 --> 00:05:11.09

I'll go ahead and apply it to cmyk,



139

00:05:11.09 --> 00:05:13.02

and it looks great here.



140

00:05:13.02 --> 00:05:14.04

Now of course, we're not going to have



141

00:05:14.04 --> 00:05:15.09

those super saturated violets



142

00:05:15.09 --> 00:05:17.04

that we have in rgb



143

00:05:17.04 --> 00:05:20.00

because cmyk does not support them.



144

00:05:20.00 --> 00:05:22.07

But otherwise the effect is looking great.



145

00:05:22.07 --> 00:05:24.04

And that's because we are able



146

00:05:24.04 --> 00:05:28.09

to take advantage of

all four of those inks.



147

00:05:28.09 --> 00:05:31.04

Now let's take a look at the

effect that really falls apart,



148

00:05:31.04 --> 00:05:32.05

and that's difference.



149

00:05:32.05 --> 00:05:35.05

Which I'll apply by pressing shift nine.



150

00:05:35.05 --> 00:05:38.06

It ends up looking like a

very colorful floating head



151

00:05:38.06 --> 00:05:40.00

here in rgb.



152

00:05:40.00 --> 00:05:42.00

If I apply it in cmyk,



153

00:05:42.00 --> 00:05:45.05

it ends up looking like

nothing of the kind.



154

00:05:45.05 --> 00:05:47.03

And here's the reason.



155

00:05:47.03 --> 00:05:49.03

I'll go ahead and turn

off black for a moment.



156

00:05:49.03 --> 00:05:50.05

And you can see



157

00:05:50.05 --> 00:05:54.02

that we have a similar effect going to rgb



158

00:05:54.02 --> 00:05:57.07

if we only rely on cyan,

magenta, and yellow.



159

00:05:57.07 --> 00:05:58.07

But what's happening



160

00:05:58.07 --> 00:06:02.00

is that the black channel

is completely inverting,



161

00:06:02.00 --> 00:06:03.02

as we're seeing here,



162

00:06:03.02 --> 00:06:06.02

and that provides us with

a very different effect.



163

00:06:06.02 --> 00:06:08.04

There's nothing analogous

to the black channel



164

00:06:08.04 --> 00:06:11.05

when you're working with an rgb image.



165

00:06:11.05 --> 00:06:13.02

So, you may wonder at this point,



166

00:06:13.02 --> 00:06:15.02

so does that mean if I want

to work with blend modes,



167

00:06:15.02 --> 00:06:18.02

I need to work in a cmyk color space.



168

00:06:18.02 --> 00:06:20.06

Well, obviously you're

going to get better results.



169

00:06:20.06 --> 00:06:22.00

There's no doubt there.



170

00:06:22.00 --> 00:06:23.07

And it is a good way to work.



171

00:06:23.07 --> 00:06:25.04

Increasingly I'm finding myself,



172

00:06:25.04 --> 00:06:28.07

regardless of what the final

destination for a job is,



173

00:06:28.07 --> 00:06:30.02

I'll start it in rgb



174

00:06:30.02 --> 00:06:32.03

and then convert it to cmyk.



175

00:06:32.03 --> 00:06:33.07

That does mean I'm going



176

00:06:33.07 --> 00:06:36.06

to compromise my colors in the conversion.



177

00:06:36.06 --> 00:06:38.00

But sometimes that's worth it.



178

00:06:38.00 --> 00:06:40.05

Especially if you want to

take advantage of blend modes.



179

00:06:40.05 --> 00:06:42.05

Another option that's available to you



180

00:06:42.05 --> 00:06:44.01

is to start in cmyk,



181

00:06:44.01 --> 00:06:46.02

and then switch back to rgb.



182

00:06:46.02 --> 00:06:48.03

That's going to sound like

a little bit of heresy



183

00:06:48.03 --> 00:06:49.06

but here's what it looks like.



184

00:06:49.06 --> 00:06:51.07

I'll go ahead and turn

all the inks back on.



185

00:06:51.07 --> 00:06:53.09

I'm still working inside the cmyk image.



186

00:06:53.09 --> 00:06:55.03

You can see that it's highlighted



187

00:06:55.03 --> 00:06:57.04

over here in the right

hand side of the screen.



188

00:06:57.04 --> 00:06:59.04

And I'll go over to the file menu.



189

00:06:59.04 --> 00:07:01.00

Choose document color mode.



190

00:07:01.00 --> 00:07:03.02

And choose rgb color.



191

00:07:03.02 --> 00:07:05.06

Now that doesn't restore

any of the saturation



192

00:07:05.06 --> 00:07:08.06

to the cmyk safe colors in the gradient.



193

00:07:08.06 --> 00:07:11.07

But it gives us a much

more satisfying effect



194

00:07:11.07 --> 00:07:12.09

where the difference mode



195

00:07:12.09 --> 00:07:15.04

in particular right now is concerned.



196

00:07:15.04 --> 00:07:16.06

And so notice also,



197

00:07:16.06 --> 00:07:18.02

we get a much better effect



198

00:07:18.02 --> 00:07:20.02

where screen is concerned.



199

00:07:20.02 --> 00:07:24.02

We once again gain access to

our familiar floating head



200

00:07:24.02 --> 00:07:26.06

even if it's a little washed out



201

00:07:26.06 --> 00:07:29.01

compared to the rgb version.



202

00:07:29.01 --> 00:07:31.08

But they are very akin to each other.



203

00:07:31.08 --> 00:07:33.08

And so, my recommended work flow,



204

00:07:33.08 --> 00:07:37.01

if you're ultimately bound

for commercial reproduction,



205

00:07:37.01 --> 00:07:41.06

is to assign all of your

colors cmyk safe values.



206

00:07:41.06 --> 00:07:44.01

And then, if you want to

take advantage of blend modes



207

00:07:44.01 --> 00:07:46.08

work in the rgb color space.



208

00:07:46.08 --> 00:07:49.00

And as outlandish as that sounds



209

00:07:49.00 --> 00:07:51.05

what you can then do

is place the file into,



210

00:07:51.05 --> 00:07:52.03

for example,



211

00:07:52.03 --> 00:07:56.01

in design and convert

it to cmyk at that point



212

00:07:56.01 --> 00:07:58.08

after the effects have

already been assigned.



213

00:07:58.08 --> 00:08:02.07

But again, if you try to

convert this file from rgb,



214

00:08:02.07 --> 00:08:04.09

even though these are cmyk safe colors,



215

00:08:04.09 --> 00:08:07.00

if you try to convert the file



216

00:08:07.00 --> 00:08:08.09

to the cmyk color mode,



217

00:08:08.09 --> 00:08:11.03

then that screen effect in particular



218

00:08:11.03 --> 00:08:14.00

may very well end up going awry.