diff --git a/src/escpos.gleam b/src/escpos.gleam
index 42abb62..302f98d 100644
--- a/src/escpos.gleam
+++ b/src/escpos.gleam
@@ -166,7 +166,7 @@ pub fn image(cb: CommandBuffer, image: image.PrintableImage) -> CommandBuffer {
 }
 
 /// Prints a monochrome image prepared by the `image` module. This is using an older
-/// method to print images, useful for some printers that does not understand graphic buffer
+/// method to print images, useful for some printers that do not understand graphic buffer
 /// commands.
 ///
 /// ## Example
diff --git a/src/escpos/document.gleam b/src/escpos/document.gleam
index bdda520..4f00c48 100644
--- a/src/escpos/document.gleam
+++ b/src/escpos/document.gleam
@@ -185,7 +185,9 @@ pub fn image(image: image.PrintableImage) -> Command {
   Image(image)
 }
 
-/// Prints an image.
+/// Prints a monochrome image prepared by the `image` module. This is using an older
+/// method to print images, useful for some printers that do not understand graphic buffer
+/// commands.
 ///
 /// ## Example
 ///
diff --git a/src/escpos/protocol.gleam b/src/escpos/protocol.gleam
index 7e3ae7d..5156430 100644
--- a/src/escpos/protocol.gleam
+++ b/src/escpos/protocol.gleam
@@ -261,13 +261,9 @@ pub fn image_to_raster(
   let y_high = height / 256
 
   <<
-    // GS v 0 m xL xH yL yH d1..dk
-    29,
-    // GS
-    118,
-    // 'v'
-    48,
-    // '0'
+    gs,
+    "v",
+    "0",
     0,
     // m = 0 (normal mode)
     x_low,