diff --git a/fichero_printer/fichero/printer.py b/fichero_printer/fichero/printer.py
index 1614776..d9c5d4e 100644
--- a/fichero_printer/fichero/printer.py
+++ b/fichero_printer/fichero/printer.py
@@ -35,6 +35,7 @@ PRINTER_NAME_PREFIXES = ("FICHERO_", "D11s_")
 PRINTHEAD_PX = 96  # Fichero/D11s printhead width in pixels
 BYTES_PER_ROW = PRINTHEAD_PX // 8  # 12 bytes per row (96 pixels / 8)
 DOTS_PER_MM = 8  # 203 DPI / 25.4 mm/inch ≈ 8 dots/mm
+DELAY_AFTER_DENSITY = 0.10  # printer needs time to apply density setting
 
 # --- Timing constants ---
 CHUNK_SIZE_BLE = 200  # BLE MTU-limited